Section 3.1 Quiz

What is the vertex of the parabola: $y=2\left(x-3\right)^2+4$  

• (3,4)

• (-3,4)

• (3, -4)

• (-3,-4)

What causes the graph of y = x² to open downward?

• multiply the x² by a fraction
• multiply the x² by a decimal
• multiply the x² by a negative number
• multiply the x² by a number greater than 1

Tags

CCSS.HSF-IF.C.7A

Which of the following is the correct equation for the given graph?

• $f\left(x\right)=\left(x-2\right)^2-1$

• $f\left(x\right)=\left(x+2\right)^2-1$

• $f\left(x\right)=-\left(x+2\right)^2-1$

• $f\left(x\right)=-\left(x-2\right)^2-1$

What equation would you use to find the vertex given  $y=ax^2+bx+c$  

•  $x=-\frac{b}{2a}$  

•  $x=\frac{-b\ \pm\sqrt{b^2-4ac}}{2a}$  

•  $x=\left(\frac{b}{2}\right)^2$  

•  $y=a\left(x-h\right)^2+k$  

Which of the following is vertex form of a quadratic function?

•  $x=-\frac{b}{2a}$  

•  $x=\frac{-b\ \pm\sqrt{b^2-4ac}}{2a}$  

•  $y=ax^2+bx+c$  

•  $y=a\left(x-h\right)^2+k$