Understanding Variables and Graphs

In the equation N = 12P, what does the variable P represent?

• The total number of pencils

• The number of students

• The price of pencils

• The number of packages

What is the dependent variable in the relationship between packages and pencils?

• Number of students

• Price per package

• Total number of pencils

• Number of packages

If Sarah buys 5 packages of pencils, how many pencils does she have in total?

• 60

• 48

• 72

• 84

How many packages did Sarah purchase if she has 168 pencils?

• 12

• 16

• 18

• 14

In the road trip example, what does the point (4, 200) represent?

• 4 miles in 200 hours

• 200 hours in 4 miles

• 4 hours in 200 miles

• 200 miles in 4 hours

What is the equation for the relationship between time and distance in the road trip example?

• Time = Distance / 50

• Distance = Time / 50

• Time = 50 * Distance

• Distance = 50 * Time

If an item originally costs $20, what is its discounted price at 50% off?

• $5

• $10

• $15

• $20

What is the independent variable when graphing the relationship between original and discounted prices?

• Number of items

• Original price

• Discounted price

• Percentage discount

How can you determine the discounted price of an item using a graph?

• By finding the intersection of the lines

• By measuring the distance between points

• By looking at the Y value when X is the original price

• By calculating the slope of the line

If the original price is $30, what is the discounted price?

• $25

• $15

• $10

• $20