Q2 Math Benchmark Review - 8th Grade

Front

What is a function in mathematics?

Back

A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.

Front

How do you determine if a set of values represents a function?

Back

A set of values represents a function if no two ordered pairs have the same first element (input).

Front

What is the solution to the equation x + 3 = -9?

Back

x = -12.

Front

What is the reflection of a point (x, y) over the x-axis?

Back

The reflection is (x, -y).

Front

What is the perimeter of an equilateral triangle?

Back

The perimeter is the sum of the lengths of all three sides, which are equal in an equilateral triangle.

Front

If the perimeter of an equilateral triangle is 21 cm, what is the length of one side?

Back

The length of one side is 21 cm ÷ 3 = 7 cm.

Front

What happens to the side lengths of a triangle when it is dilated by a scale factor of k?

Back

The side lengths are multiplied by the scale factor k.

Front

What is the new perimeter of a triangle if its original perimeter is 21 cm and it is dilated by a scale factor of 4?

Back

The new perimeter is 21 cm × 4 = 84 cm.

Front

What is the formula for finding the coordinates of a reflection over the y-axis?

Back

The reflection of a point (x, y) over the y-axis is (-x, y).

Front

What is the formula for finding the coordinates of a reflection over the x-axis?

Back

The reflection of a point (x, y) over the x-axis is (x, -y).