CPM Homework Help : CCAA8 Problem 8-58

Graph $y=x^2-8x+7$ and label its vertex, $x\text{-intercepts}$ , and $y\text{-intercepts}$ .

Hint 1:

Make a table.

Hint 2:

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

Hint 3:

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

Hint 4:

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

Answer:

Opening Upward.

x-intercepts:

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

y-intercepts:

$(0,7)$

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: 8-58 HW eTool