### Home > CCG > Chapter 8 > Lesson 8.1.5 > Problem8-64

8-64.

On graph paper, graph the parabola $y = 2x^2 − x − 15$. 8-64 HW eTool (Desmos). Homework Help ✎

1. What are the roots ($x$-intercepts) of the parabola? Write your points in $(x, y)$ form.

Look at the graph above to help you write your points in $(x, y)$ form.

2. How would the graph of $y = −(2x^2 − x − 15)$ be the same or different? Can you tell without graphing?

What does multiplying $−1$ into an equation do to the graph?
Think, how is $y = x$ different from $y = −x$.

Use the eTool below to solve each part.
Click the link at right for the full version of the eTool: CCG 8-64 HW eTool