Question

practice #5

1. does the price of apples always increase with the demand?
2. what is the demand for apples when the price is $5 per bag of apples?
3. what is the price per bag of apples when the demand is 80?

practice #5

1. how does the enrollment in physical science compare with chemistry over the years?
2. why does this graph have a legend?
3. what year had more students enrolled in chemistry than physical science?

Explanation:

Practice #5 (Quantity Demand vs Price per bag of Apples)

Step1: Analyze demand - price relationship

In general, according to the law of demand, price and demand have an inverse relationship. So, the price of apples does not always increase with demand.

Step2: Read demand from graph at $5 price

From the bar - graph, when the price per bag of apples is $5, the quantity demanded per week is 20.

Step3: Read price from graph at 80 demand

From the bar - graph, when the quantity demanded is 80, the price per bag of apples is $2.

Step1: Compare enrollment trends

By observing the line - graph, we can see the fluctuations in the number of students enrolled in physical science and chemistry over the years. In some years, physical science has higher enrollment and in some years, chemistry has higher enrollment.

Step2: Understand the function of a legend

A legend is used to identify which line represents which data series. In this graph, it helps to distinguish between the enrollment in physical science and chemistry.

Step3: Identify year with more chemistry students

By looking at the graph, in 1986, the number of students enrolled in chemistry is higher than that in physical science.

Answer:

1. No
2. 20
3. $2

Practice #6 (Students Enrolled in Physical Science and Chemistry at North High School vs. Years)