CPM Homework Help : INT2 Problem 5-20

Graph $y=x^2-8x+7$ and fully describe it.

Hint 1:

Make a table. Use integers from $−1$ to $9$ for your inputs.

Hint 2:

The $x\text{-intercepts}$ are where the graph intersects the
$x\text{-axis}$ , or where $y=0$ .

Hint 3:

The $y\text{-intercept}$ is where the graph intersects the $y\text{-axis}$ , or where $x=0$ .

Hint 4:

The vertex is the lowest or highest point on the parabola.

Answer:

Parabola opening upward.

x-intercepts:

$(1,0)$ and $(7,0)$

y-intercept:

$(0,7)$

vertex:

$(4,-9)$

Use the eTool below to help you answer the parts of the problem.
Click on the link at right for the full eTool version: INT2 5-20 HW eTool