Grade 8th Math STAAR Practice Test

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other is constant. For example, in the equation y = kx, k is the constant of proportionality.

Front

Which equation does NOT show a proportional relationship?

Back

y = 7x - 9 does not show a proportional relationship because it includes a constant term (-9) that affects the ratio.

Front

What is the formula for the surface area of a triangular prism?

Back

The surface area (SA) of a triangular prism can be calculated using the formula: SA = base area + lateral area.

Front

How do you calculate the total surface area of a prism?

Back

To calculate the total surface area of a prism, find the area of the base and multiply by the height, then add the areas of the lateral faces.

Front

What is the formula for the volume of a cone?

Back

The volume (V) of a cone is given by the formula: V = (1/3)πr²h, where r is the radius and h is the height.

Front

What is the volume of a cone with a radius of 6 cm and a height of 10 cm?

Back

Front

What is the minimum amount a student needs to earn per month to pay for college costs?

Back

To find the minimum amount, subtract the scholarship and loan from the total cost, then divide by the number of months.

Front

If the total cost is $4000, scholarship is $1500, and loan is $1000, what is the remaining cost?

Back

The remaining cost is $4000 - $1500 - $1000 = $2500.

Front

How do you find the minimum monthly earnings needed to cover remaining costs?

Back

Divide the remaining cost by the number of months until payment is due.

Front

What is the Pythagorean theorem?

Back

The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b): c² = a² + b².