You can put this solution on YOUR website!
takes the same value for x as for -x.
Functions that do that are called even functions and are symmetrical with respect to the y-axis.
The y-axis is the line
You can get five points if you just calculate the value of the function at x=0, and at a couple of positive x values. You get the symmetrical points on the side with negative x for free.
, which gives you the point (0,1).
, which gives you the point (2,3).
, which gives you the point (4,9).
No calculations are required for the symmetrical points (-2,3) and (-4,9); you just change the sign of the x coordinate.
Next, plot the five points
and then draw a reasonable line
Doing it with pencil and paper, show my calculations first, with few, if any, words. Then I would have the line with the points clearly marked on just one graph, and I would include a table with the x and y values next to the graph. However, you should do it in whatever style your teacher prefers.