8.1 - 8.3 Test Practice

Which of the following is the equation of a parent function that has undergone a vertical stretch by a factor if 7 and reflected over the x-axis

• y = -7x²

• y = 7x²

• y = x² + 7

• y = x² - 7

Compared to the parent function, f(x) = x², which of the following is the equation of the function after a vertical stretch by a factor of 3?

• f(x) = 3x²

• f(x) =(1/3)x²

• f(x) = x² + 3

• f(x) = x² - 3

Describe the transformations of f(x) when compared to the parent function.

f(x)=x²+5

• horizontal shift right 5 units

• horizontal shift left 5 units

• vertical shift up 5 units

• vertical shift down 5 units

Which of the following describes the transformations done to the quadratic parent function of f(x) = x² to obtain g(x) = 2x² + 4 ?

• Vertical Stretch by a factor of 2 and vertical shift up 4 units

• Vertical Shrink/Compress by a factor 2 and vertical shift up 4

• Vertical Stretch by a factor of 2 and horizontal shift left 4 units

• Vertical Shrink/Compress by a factor of 2 and horizontal shift right 4 units

Describe the transformation of

f(x) = x² -8 when compared to the parent function

• Vertical shift sp 8 units

• Vertical shift down 8 units

• Horizontal shift right 8 units

• Horizontal shift left 8 units

What is the equation of the quadratic function obtained from vertically shrinking the parent function by 3/5 and then shifted up 8 units?

• f(x)= 3/5(x-8)²

• f(x)=3/5x²+8

• f(x)=x²

• f(x)=3/5x²-8

Use the graph to determine the solutions.

• -1 and -3
• 1 and -3
• 1 and 3
• -1 and 3

What is a, b, and c in 3x² + 4 = 5x?

• a = 3, b = -5, c = 4
• a = 3, b = 5, c = 4
• a = 3, b = 5, c = -4
• a = 3, b = -5, c = -4

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

What is another name for the x-intercepts of a quadratic?

• y-intercepts
• zeros
• x-axis
• none of these

Tags

CCSS.HSF-IF.C.7C

Find the zeros.

x² -4 = 77

• 9

• -9

• No Real Solutions

• 9, -9