Question

graph worksheet
graphing & intro to science
name
a. graph the following information in a bar graph. label and number the x and y axis appropriately.

months	# of deer
oct	32
nov	26
dec	20
jan	15
feb	12

1. what is the independent variable?
2. what is the dependent variable?
3. what is an appropriate title?
4. what is the average number of deer per month?

b. graph the following information in a line graph. label and number the x and y - axis appropriately.

# of days	# of bacteria
2	16
3	40
4	80
5	100
6	200

1. what is the independent variable?
2. what is the dependent variable?
3. what is an appropriate title?

Explanation:

1. For deer - data bar graph:

Step1: Identify independent variable

The months change on their own, not affected by the number of deer. So, months is the independent variable.

Step2: Identify dependent variable

The number of deer depends on the month. So, number of deer is the dependent variable.

Step3: Determine title

It should describe the relationship, so "Number of Deer per Month" is appropriate.

Step4: Calculate average

Sum the number of deer values and divide by number of months. $\frac{38 + 32+26 + 20+15+12}{6}=\frac{143}{6}\approx23.83$.

1. For bacteria - data line graph:

Step1: Identify independent variable

The number of days changes on its own, not affected by the number of bacteria. So, number of days is the independent variable.

Step2: Identify dependent variable

The number of bacteria depends on the number of days. So, number of bacteria is the dependent variable.

Step3: Determine title

It should describe the relationship, so "Growth of Bacteria over Days" is appropriate.

Answer:

1. For the deer - data bar graph:

• Independent variable: Months
• Dependent variable: Number of deer
• Appropriate title: "Number of Deer per Month"
• Average number of deer per month: $\frac{38 + 32+26 + 20+15+12}{6}=\frac{143}{6}\approx23.83$

1. For the bacteria - data line graph:

• Independent variable: Number of days
• Dependent variable: Number of bacteria
• Appropriate title: "Growth of Bacteria over Days"