Review for Unit 4 PC #4 - Zeros/Literal (SY21)

Marci determines the zeros of the function f(x) to be 3 and -5. What could be Marci’s function?

• f(x) = (x + 3)(x - 5)

• f(x) = (x + 3)(x + 5)

• f(x) = (x - 3)(x - 5)

• f(x) = (x - 3)(x + 5)

John determines the zeros of the function f(x) to be - 8 and  $\frac{3}{5}$  .  What could be Marci’s function?

• f(x) = (x + 8)(3x - 5)

• f(x) = (x - 8)(3x + 5)

• f(x) = (x + 8)(5x - 3)

• f(x) = (x - 8)(5x + 3)

Using the intercepts, write a quadratic equation for the graph shown.

• y = (x + 3)(x + 4)

• y = (x - 3)(x - 4)

• y = (x - 3)(x + 4)

• y = (x + 3)(x - 4)

Rearrange the formula  $W=\frac{1}{3}xr^2$   for  $r.$  

•  $r=\sqrt{\frac{W}{3x}}$  

•  $r=\sqrt{\frac{3x}{W}}$  

•  $r=\sqrt{\frac{3W}{x}}$  

•  $r=\sqrt{\frac{x}{3W}}$  

Which equation, when graphed, represents a parabola with a maximum value at y = 5?

• $y=−(x+3)^2+5$

• $y=(x-5)^2+3$

• $y=\left(x-3\right)^2+5$

• $y=−(x+3)^2-5$

Which equation, when graphed, represents a parabola with a minimum value at y = 2?

• $y=−(x+5)^2+2$

• $y=(x-5)^2+2$

• $y=(x+5)^2-2$

• $y=−(x-2)^2-5$

What are the roots of the following quadratic equation?

•  $1\ \ and\ \ 3$ 
  

•  $-1\ \ and\ -3$ 
  

•  $-1\ \ and\ \ 3$ 
  

•  $1\ \ and\ \ -3$