Constructing and Interpreting Functions

Which function passes through the points (2, 15) and (3, 26)?

• y = 11x + 7

• y = 11x - 7

• y = 7x + 11

• y = -11x - 7

• y = 7x - 11

Which function represents Walter's situation?

• y = 6x

• y = 6

• y = 8

• y = 8x

Wayne needs to drive 470 miles to reach Milwaukee. Suppose he drives at a constant speed of 50 mph. Which function represents Wayne's distance from Milwaukee in terms of the number of hours that he drives?

• y = 420x

• y = 470 + 50x

• y = 50 - 470x

• y = 50 + 470x

• y = 470 - 50x

Which function passes through the points (2, 3) and (4, 4)?

• $y\ =\ \frac{2}{3}x+2$

• $y\ =\ x+4$

• $y\ =\ \frac{1}{2}x\ +\ 2$

• $y\ =\ 2x\ +\ 3$

• $y\ =\ 2x\ +\ \frac{1}{2}$

Which two tables represent the same function? You MUST pick two.

• 
• 
• 
• 
• 

1. Drive Down is a racing video game. The game gives each player an initial amount of $5,000 in virtual money. After that, a player gets $500 in virtual money for each race won. What function represents the amount of virtual money a player has in terms of the number of races won?

• $y=500x-5000$

• $y=5000x+500$

• $y\ =\ 5000x-500$

• $y\ =\ 500x+5000$

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled.

Select the true statement below.

• The total capacity of the water tank is 2000 gallons.

• The total capacity of the water tank is 400 gallons.

• The rate of change for the graph is 300 gallons per hour.

• The rate of change for the graph is $-\frac{2}{5}$ .

The amount in dollars an electrician charges in terms of the number of hours worked is given by the function

y = 22x + 42.

Which statements below are true? Choose two.

• The electrician charges an initial fee of $22.

• The electrician charges an initial fee of $42.

• The electrician charges $22 per hour.

• The electrician charges $42 per hour.

Sam owes his friend a certain amount of money. The function y = 12x - 40 represents the amount of money that Sam has after he pays his friend back in terms of the number of hours that he works.

How much money does Sam owe his friend?

• $12

• $40

• $y

• $x