Question

example 1: make a data table for the following information
the following information was collected for the growth of a plant.
on day 0, there was 0 growth.
on day 1, there was 2.0 cm of growth.
on day 2, there was 5.3 cm of growth.
on day 3, there was 6.1 cm of growth.
on day 4, there was 8.4 cm of growth.
on day 5, there was 11 cm of growth.

1. in the top row, place the title of your data table.
2. in the next row, place the two column heads.
3. in the remaining rows, fill in the data.

example 2: make a data table for the following information
the number of cricket chirps was recorded on two different nights at various temperatures (celsius).

on night 1, the following data was obtained:

• temp 16, cricket chirps 33
• temp 18, cricket chirps 38
• temp 20, cricket chirps 42
• temp 22, cricket chirps 46
• temp 24, cricket chirps 50.

on night 2, the following data was obtained:

• temp 16, cricket chirps 32
• temp 18, cricket chirps 36
• temp 20, cricket chirps 41
• temp 22, cricket chirps 43
• temp 24, cricket chirps 51.

1. in the top row, place the title of your data table.
2. in the next row, place the two column heads. since data was obtained on two different nights, you will need 4 columns.
3. in the remaining rows, fill in the data.

iv. making a line graph

line graphs show data plotted as points that are connected by a line. line graphs are often used to show change over time and can be used to compare two or more sets of data.

before a line graph can be constructed, you must identify the two variables that will serve as x and y coordinates on the graph. these are called the _____________ and the _____________.

the independent variable is the one being _______________ during the experiment.
it is always placed on the _______________.

the dependent variable is the observed result of the independent variable being changed. the dependent variable is always placed on the _______________.

an easy way to remember this is to ask yourself the questions, \what did i know before i did the experiment?\ (independent variable) and \what did i learn by doing the experiment?\ (dependent variable)

using the grid below, make a line graph using the information in example 1 from above.

be sure to: (1) determine which variable to place on the horizontal (x) axis and which variable to place on the vertical (y) axis. (2) label each axis appropriately. (3) scale each axis appropriately. (4) title your graph.

Explanation:

IV. Making a Line Graph

1. Filling the Blanks:

• The two variables that will serve as x and y coordinates on the graph are called the independent variable and the dependent variable.
• The independent variable is the one being manipulated (or changed) during the experiment. It is always placed on the x - axis (horizontal axis).
• The dependent variable is always placed on the y - axis (vertical axis).

2. Making the Line Graph for Example 1:

Step 1: Determine Variables

• Independent variable: Day (since it is the variable we know before the experiment, it is the one we can control or it progresses in a fixed manner). Place it on the x - axis.
• Dependent variable: Plant Growth (in cm) (it is the result we observe based on the day, so it depends on the day). Place it on the y - axis.

Step 2: Label Axes

• X - axis label: "Day"
• Y - axis label: "Plant Growth (cm)"

Step 3: Scale Axes

• X - axis: We have days from 0 to 5. So we can mark the x - axis with intervals of 1 (0, 1, 2, 3, 4, 5).
• Y - axis: The growth values range from 0 to 11 cm. We can mark the y - axis with intervals of 2 or 1. Let's use intervals of 2: 0, 2, 4, 6, 8, 10, 12.

Step 4: Plot Points and Draw Line

• For day 0, growth is 0 cm: Plot the point (0, 0).
• For day 1, growth is 2.0 cm: Plot the point (1, 2.0).
• For day 2, growth is 5.3 cm: Plot the point (2, 5.3).
• For day 3, growth is 6.1 cm: Plot the point (3, 6.1).
• For day 4, growth is 8.4 cm: Plot the point (4, 8.4).
• For day 5, growth is 11 cm: Plot the point (5, 11).
• Then, connect these points with a line.

Step 5: Title the Graph

• Title: "Plant Growth Over Days"

Filling the Blanks Answers:

1. independent variable; dependent variable
2. manipulated (or changed); x - axis (horizontal axis)
3. y - axis (vertical axis)

Line Graph Description:

The line graph has "Day" on the x - axis (scaled from 0 to 5 with interval 1) and "Plant Growth (cm)" on the y - axis (scaled from 0 to 12 with interval 2). Points are plotted at (0, 0), (1, 2.0), (2, 5.3), (3, 6.1), (4, 8.4), (5, 11) and connected with a line. The title is "Plant Growth Over Days".

Answer:

IV. Making a Line Graph

1. Filling the Blanks:

• The two variables that will serve as x and y coordinates on the graph are called the independent variable and the dependent variable.
• The independent variable is the one being manipulated (or changed) during the experiment. It is always placed on the x - axis (horizontal axis).
• The dependent variable is always placed on the y - axis (vertical axis).

2. Making the Line Graph for Example 1:

Step 1: Determine Variables

• Independent variable: Day (since it is the variable we know before the experiment, it is the one we can control or it progresses in a fixed manner). Place it on the x - axis.
• Dependent variable: Plant Growth (in cm) (it is the result we observe based on the day, so it depends on the day). Place it on the y - axis.

Step 2: Label Axes

• X - axis label: "Day"
• Y - axis label: "Plant Growth (cm)"

Step 3: Scale Axes

• X - axis: We have days from 0 to 5. So we can mark the x - axis with intervals of 1 (0, 1, 2, 3, 4, 5).
• Y - axis: The growth values range from 0 to 11 cm. We can mark the y - axis with intervals of 2 or 1. Let's use intervals of 2: 0, 2, 4, 6, 8, 10, 12.

Step 4: Plot Points and Draw Line

• For day 0, growth is 0 cm: Plot the point (0, 0).
• For day 1, growth is 2.0 cm: Plot the point (1, 2.0).
• For day 2, growth is 5.3 cm: Plot the point (2, 5.3).
• For day 3, growth is 6.1 cm: Plot the point (3, 6.1).
• For day 4, growth is 8.4 cm: Plot the point (4, 8.4).
• For day 5, growth is 11 cm: Plot the point (5, 11).
• Then, connect these points with a line.

Step 5: Title the Graph

• Title: "Plant Growth Over Days"

Filling the Blanks Answers:

1. independent variable; dependent variable
2. manipulated (or changed); x - axis (horizontal axis)
3. y - axis (vertical axis)

Line Graph Description:

The line graph has "Day" on the x - axis (scaled from 0 to 5 with interval 1) and "Plant Growth (cm)" on the y - axis (scaled from 0 to 12 with interval 2). Points are plotted at (0, 0), (1, 2.0), (2, 5.3), (3, 6.1), (4, 8.4), (5, 11) and connected with a line. The title is "Plant Growth Over Days".