Slope and Functions

Which graph represents a linear function?

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Which two functions meet the following criteria?

• The y-intercepts have a difference of 3.

• The slopes are both negative.

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A rental car company charges $45 for the car as well as charging a one-time $25 fee for the car's navigation system (GPS). Write an equation for the cost in dollars, y, as a function of the number of days, x, the car as rented.

The graph shows different speeds, in miles per hour (mph), of a car traveling on a trip.

How fast was the car traveling in miles per hour (mph) between 25 minutes and 40 minutes?

• speeds between 20 mph and 50 mph

• speeds between 35 mph and 0 mph

• a constant speed of 40 mph

• a constant speed of 50 mph

• A

• B

• C

• D

The table represents a linear relationship. Find the slope of the relationship.

Which of the relationships below is a function?

• (6,3) (5,2) (6,8) (0,7)

• (8,2) (1,7) (-1,2) (1,9)

• (4,3) (3,0) (-1,3) (2,7)

• (7,1) (0,0) (6,2) (0,4)

Choose ALL terms below that refer to the point where a line crosses the y-axis

• b

• rate of change

• y-intercept

• x-coordinate

• initial value

Choose ALL equations below that represent nonproportional relationships

• y = 5x

• y = -5x + 3

• y = 5x - 3

• y = 1/3x

• y = 5 - 3x

Which term does NOT correctly describe the relationship shown in the table?

• function

• linear

• proportional

• nonproportional