Math Semester Exam Practice

Which of these graphs does NOT show a proportional relationship?

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Which of these graphs shows a proportional relationship?

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Which of these graphs does NOT show a proportional relationship?

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Lee is selling bracelets. This equation shows how Lee's revenue (y) depends on the number of bracelets sold (x). y = 4x. What is the revenue if Lee sells 5 bracelets?

• 10

• 15

• 25

• 20

Patrick is buying violas. This equation shows how the total cost (y) depends on the number of violas purchased (x). y = 3x How much would Patrick spend if he buys 4 violas?

• $15

• $12

• $10

• $9

y=3x

What is the Constant Rate of Change?

• 3

• 5

• 7

• 10

Rob is selling whistles. This equation shows how Rob's revenue (y) depends on the number of whistles sold (x). y = 2x What is Rob's revenue if he sells 5 whistles?

• $5

• $10

• $15

• $20

How much revenue does Rob get for each whistle?

y = 2x

• $3 per whistle.

• $1 per whistle.

• $2 per whistle.

• $5 per whistle.

Pocahontas is buying violas. This chart shows how the cost depends on the number of violas purchased. What is the cost of each violas?

• $5

• $6

• $7

• $8

Sid is selling phones. This chart shows how Sid's revenue depends on the number of phones sold.

What is the equation to show Sid's revenue (y) after selling x phones?

• y = 2x

• y = x + 3

• y = 3x - 3

• y = 2x + 1