Functions

This graph represents which function?

• y = -2x
• y = 2x
• y = -2x + 1
• y = 2x - 1

Complete the function table for y = -2x + 1.

• -2(2) + 1; -2
• -2(2) + 1; -3
• -2(2) + 1; -1
• -2(2) + 1; 0

The grocery store sells cantaloupes for $4.50 per pound.  Write a function to represent the cost, c, for the number of pounds of cantaloupes bought, p.

• c = 45p
• c = 4.5p
• p = 4.5c
• p = 45c

Is the relation a function?

• yes, it is a function
• no, it is not a function
• not enough information to determine

The table shows the amount of money Anisha is paid for working different numbers of hours.  What would be Anisha's total pay if she works for 24 hours in a week?

• $170
• $168
• $175
• $180

Is the relation a function?

• yes, it is a function
• no, it is not a function
• not enough information to determine

The deli in the grocery store gives each customer a free cup of coffee worth $1.50.  Which graph represents the function if 5, 10, 15, or 20 customers get free coffee?

• F
• G
• H

The initial weight of a container is 6.2 pounds. As water is added to the container, the weight increases at a rate of 0.6 pounds per minute. Which function models the weight of the container as a function of time?

• f(t)=0.6t+6.2
• f(t)=t+6.8
• f(t)=6.2-0.6t
•                                           f(t)=6.2t+0.6

Which equation represents the line that passes through the point (1,5) and has an undefined/no slope?

• x=1
• x=5
• y=1
• y=5

Is this mapping a function or not a function? 

• Function
• Not a Function