Math 2 Review

1 Trapezoid WKRP was translated 4 units to the left and 5 units up on a coordinate grid to create trapezoid W'K'R'P′. Which rule describes this transformation?

• (x ,y) →

  (x − 4, y + 5)

• (x, y) →

  (x + 4, y − 5)

• (x, y) →

  (x + 4, y + 5)

• (x, y) →

  (x − 4, y − 5)

A water tank currently contains 275 gallons of water. The amount of water in the tank will decrease at a constant rate of 15 gallons per week. Which function can be used to find t, the total number of gallons of water in the tank after w weeks?

• t = 15w − 275

• t = −15w + 275

• t = 275w − 15

• t = −275w + 15

A transformation is applied to a figure to create a new figure on a coordinate grid. Which transformation does NOT preserve congruence?

• A rotation of 270° counterclockwise

• A reflection across the y-axis

• A dilation by a scale factor of 1.5

• A translation of 50 units down

A linear function is represented on the coordinate grid. What is the y-intercept of the graph of this function?

• 5

• 6

• -7/8

• -8/7

A teacher opened an investment account at a bank. At the end of each year, the bank paid 6.4% annual simple interest on the money in the account. The table shows the activity in the account for three years. Which statement explains why the balance in this account has grown?

• The balance in the account has grown only because regular deposits were made to the account.

• The balance in the account has grown because regular deposits were made to the account and interest was earned on the previous year’s balance.

• The balance in the account has grown only because interest was earned on the account.

• There is not enough information to determine why the balance in the account has grown.

A figure was transformed on a coordinate grid using the rule (x, y) → (−x, −y). Which of the following describes this transformation?

• A reflection across the x-axis

• A reflection across the y-axis

• A 90° clockwise rotation about the origin

• A 180° clockwise rotation about the origin

The two lines graphed on the coordinate grid each represent an equation. Which ordered pair represents a solution to both equations?

• (-4, 0)

• (-3, 3)

• (3, -3)

• (0, 4)

• x = -5, 14

• x = 5, 14

• x = -14, -5

• x = -14, 5

• 1.875 seconds

• 2 seconds

• 2.125 seconds

• 2.625 seconds