Percent/Proportion Review

Danielle earns $36.80 for 4 hours of yardwork. MacKenzie earns $50.40 for 6 hours of yardwork. Who earns more per hour? How much more?

• Danielle; $9.20

• MacKenzie; $8.40

• Danielle; $0.80

• MacKenzie; $0.80

Shipping rates for Company A and Company B are shown in the tables below. Which company has shipping rates that represent a proportional relationship?

• Company A

• Company B

Anita is making a curtain to surround a table. She bought 

 $3\ \frac{1}{4}$  yards of fabric.  Her total cost was $13.  What was the cost per yard?

(a)  

The equation y = 5.5x represents a proportional relationship. What is the constant of proportionality?

• x

• y

• 5.5

• $\frac{1}{5.5}$

The tables show the numbers of white and yellow flowers Cara used in 5 different arrangements. Are the number of white and yellow flowers in Cara's arrangement proportional? If so what is the equation.

• yes; y = $\frac{3}{5}x$

• yes; y = $\frac{5}{3}x$

• no

Identify the constant of proportionality and write the proportional relationship.

• k = 7; y = 7x

• k = $\frac{1}{7}$ ; y = $\frac{1}{7}x$

• not proportionate; no equation

For every pound of jerky it costs (a)  

Natalie walked  $\frac{3}{5}mile$  in  $\frac{1}{2}hour.\$  How fast did she walk, in miles per hour?

•  $\frac{3}{10}mile\ per\ hour$  

•  $\frac{5}{6}mile\ per\ hour$  

•  $1\ \frac{1}{5}\ miles\ per\ hour$  

•  $2\ miles\ per\ hour$  

The Spanish club held a car wash to raise money. The equation y = 5x represents the amount of money y club members made for washing x cars. Identify the constant of proportionality.

(a)  

Sarah used 2.5 cups of cheese in a dish that serves 10 people. Arun used 1.6 cups of cheese in a dish that serves 8 people. How much more cheese is in one serving of Sarah's dish?

• 0.5 cup

• 0.25 cup

• 0.2 cup

• 0.05 cup