SEARCH HOME
Math CentralQuandaries & Queries

search

Question from Max, a student:

How do I graph y = -2x^2?

Hi Max,

I would start by plotting some points. Let me show you with y = -x2 + 1. I chose values x = 0, 1, -1, 2 and -2 and for each I found the value of y using y = -x2 + 1.

x y
0 1
1 0
-1 0
2 -3
-2 -3

Then I plotted these points on an xy coordinate system

points

Then I sketched a graph through these points

graph

Now try your example,
Penny

About Math Central
 

 


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS