Worksheet 9: Honors 8th grade spiral review

Solve the system:

2x + 7 = 7,

x - y = 1

• x = 0, y = -1

• x = 1, y = 0

• x = 2, y = 1

• x = -1, y = -2

Find the rate of change for the function y = -5/3x - 2

• -5/3

• 5/3

• 2

• -2

Triangle XYZ is moved by a translation and a rotation. The image is congruent to the original triangle.

• Yes, because translations and rotations preserve congruence.

• No, because rotation changes the size of the triangle.

• No, because translation changes the shape of the triangle.

• Yes, but only if the triangle is equilateral.

Which of the following best describes the association shown in a scatter plot of the data pairs: (1,2), (2,4), (3,6), (4,8)?

• There is a strong positive linear association.

• There is a strong negative linear association.

• There is no association.

• There is a weak positive association.

Estimate π using 3.14 and calculate the volume of a sphere with radius 10 cm.

• Volume ≈ 4186.67 cm³

• Volume ≈ 41.87 cm³

• Volume ≈ 418.67 cm³

• Volume ≈ 4186.7 cm³

A right triangle has legs 9 m and 12 m. Find the hypotenuse.

• 15 m

• 10 m

• 18 m

• 20 m

Write a function equation for a proportional relationship where y is 7 times x.

• y = 7x

• y = x + 7

• y = 7 + x

• y = x/7

Solve for x: 4x+3=3x+9

• x = 6

• x = 3

• x = 9

• x = 0

A function can be described in terms of input and output as:

• A rule that assigns each input exactly one output.

• A process that always gives the same output for any input.

• A relationship where one output can have many inputs.

• A method that does not require any input to produce an output.