### Home > INT3 > Chapter 2 > Lesson 2.2.2 > Problem 2-64

2-64.

Explain to her how she can make a good sketch of the graph of the function

without using a calculator*and*without having to make a table. Be sure to explain how to locate the vertex, whether the parabola opens upward or downward, and how its shape is related to the shape of the graph of.Where will the vertex be? Does the parabola open up or down? Is it vertically stretched?

Your friend also needs to know the

- and-intercepts. Show her how to calculate them without having to draw an accurate graph or use a graphing calculator.Substitute

for and solve forto find the-intercepts.

Substitutefor and solve forto find the-intercepts.