Proportionality STAAR Review

A hooded sweatshirt is on sale for $31.50. The original price

was $45. What is the percent discount on the sweatshirt?

• 70%

• 13.5%

• 30%

• 20%

A bakery makes muffins for $1.80 each and sells them for $2.34. What is the percent markup on each muffin?

• 30%

• 130%

• 70%

• 54%

It takes Luis 15 minutes to read 3 pages. How long will it take him to read 90 pages?

• 180 minutes

• 45 minutes

• 450 minutes

• 30 minutes

Josephine mixes 3 parts of white paint to 8 parts of red paint to make pink. How many parts of red paint should she mix with 12 parts of white paint to get the same shade?

• 2 parts red

• 4 parts red

• 24 parts red

• 32 parts red

Which of the following represent a constant rate of change?

• V

• I and V

• I, II, and III

• I, II and V

Does this graph show a proportional relationship? Why or why not?

• Yes, because the line does not go through the origin

• Yes, because it is a straight line

• No, because the line does not go through the origin

• No, because the line is going up

Write the equation for this line.

• y = 3x

• y = 3x + 4

• y = 4x + 3

• y = 4x

Isaac and his friends are going camping. Each person needs 2 pints of water every 3 hours to stay well hydrated. If they are going on 7.5 hour hike, how many pints of water should each person pack?

• 5 pints

• 6 pints

• 15 pints

• 10.5 pints

Marcie was having her fourteenth birthday party. At 2:00pm there were ten people at her party. By 4:00pm there were sixteen people at her party. By what percentage did her number of guests increase?

• 160%

• 60%

• 4%

• 104%

If Julianna travels at a rate of 25 miles per hour, which equation can be used to find d, the distance in miles Julianna traveled if she was traveling t, hours?

• d = t/25

• d = 25 + t

• d " 25 - t

• d = 25t