STAAR Review Quiz 1 (8th)

The amount of water surface area on Earth is 140,000,000 square miles. How is this number written in scientific notation?

Joe’s Canoes charges an initial fee of $20 plus $4 an hour. Callie’s Canoes charges a flat rate of $14 an hour. Find the number of hours for which the total amount that both places charge would be the same.

The graph shows the relationship between the depth of a diver and the time that has passed. Which function best represents the relationship shown in the graph?

• y = 10x - 15

• y = 2x - 15

• y = -10x - 15

• y = -15x - 10

Which set of ordered pairs represents y as a function of x?

• A

• B

• C

• D

Four triangles are shown. Based on these triangles, which statement is true?

• x = 118, because 180 - 98 = 82 and 82 + 36 = 118

• x = 46, because 36 + 98 = 134 and 180 - 34 = 46

• x = 314, because 36 +98 = 134 and 134 + 180 = 314

• x = 134, because 180 - (36 + 98) = 46 and 180 - 46 = 134

A ski chair lift is rising at a constant rate of speed. The graph models the linear relationship between the number of seconds and the height of the ski lift. Which of these best describes the rate at which the ski lift is traveling?

• 2.5 feet per second

• 0.5 feet per second

• 5 feet per second

• 5 feet per second

Which list shows these numbers in order from least to greatest?

• A

• B

• C

• D

Carolyn and Brenda are baking cupcakes. The graph shows the linear relationship between the amount of time, and the number of cupcakes each person made. After how many minutes will each baker make the same number of cupcakes?

• 30

• 10

• 3

• 0

Which representations shows a proportional linear relationship between x and y?

• Figure I only

• Figures II and III

• Figures I and III

• Figure II only

Gregg deposits the money he makes from mowing lawns into his savings account, adding it to the money his father gave him to open the account.

What is the slope and y-intercept of the table?

• slope: -12

  y-intercept: -50

• slope: 12

  y-intercept: 50

• slope: 50

  y-intercept: 12

• slope: 50

  y-intercept: -12