Quiz Review 8-10

A theater ticket costs $22.50 per person.  What is the constant or proportionality? 

• 1

• 22.50

• 0.04

• There is none.

If the unit rate is $22.50/person, how much would it cost for 8 people to go to the theater?

• $179

• $2.81

• $180

• $2.82

At Stop & Shop 6 pounds of oranges cost $5.23. What is the price for 12 pounds?

• $10.46

• $0.87

• $5.23

• $15.69

What is k equivalent to?

• The y value

• The x value

• The constant

• None of these

In 8 minutes (x), Justin can swim 4 laps (y) in a pool. What equation can be used to represent his laps per minute?

• $y=\frac{1}{2}x$

• $y=2x$

• $k=2x$

• $y=.5x$

Using the equation  $y=\frac{1}{2}x$ , where laps is y and minutes is x, how long did you swim if you completed 20 laps.

• 20 minutes

• 40 minutes

• 10 minutes

• 30 minutes

Michelle drives 60 miles per hour on the LIE. What equation can be used to represent this relationship?

• $60=kx$

• $y=60x$

• $k=60x$

• $y=\frac{60}{x}$

How do you solve for the y value when given a proportional relationship?

• Divide x and y

• Divide y and x

• Multiple k and x

• Multiple k and y

How do you determine if a graph represents a proportional relationship?

• It's a straight line

• Has a constant (k)

• Goes through the origin

What does the point  $\left(1,\ 5\right)$  represent in the context of the situation?

• 1 gallon of water used in 5 minutes

• 5 gallons of water used in 1 minute

•  $\left(1,\ 5\right)$  

•  $k=1$