8th Grade Math STAAR Fluency

Which word is NOT a word for slope (m)?

• per

• one-time fee

• each

• every

What formula do we use for direct variation?

• y = kx

• y = x + k

• y = k/x

• y = x - k

What is the rule for translations?

• (x , y) → (x ± a, y ± b)

• (x , y) → (-x , y)

• (x , y) → (x , -y)

• (x , y) → (y , -x)

What is the rule of coordinates (x, y) when rotated 180° clockwise?

• (x , y) → (-y, x)

• (x , y) → (-x , y)

• (x , y) →(-x , -y)

• (x , y) → (y , -x)

What is the formula to find the radius of a circle if the diameter is known?

What happens to the coordinates (x, y) when reflected across the x-axis?

• (x, y) → (x, -y)

• (x, y) → (-x, y)

• (x, y) → (-x, -y)

• (x, y) → (y, x)

Which transformation does not preserve orientation?

• Rotation

• Translation

• Dilation

• Reflection

What is the goal when solving equations?

• To isolate the variable

• To create more equations

• To eliminate all variables

• To graph the equation

What is the simple interest formula?

• I = PRT

• I = P + R + T

• I = PRT/100

• I = P + R - T

What is the rule for dilations?

• (x , y) → (-y, x)

• (x , y) → (kx , ky)

• (x , y) →(x , -y)

• (x , y) → (y , -x)