Question

This is the answer… but how do I SHOW it?

Answer 1

Given:

$y=-3x^2$

We need to find points that line on the given equation to draw the graph.

Set x=-2 and substitute in the equation to find the value of y.

$y=-3(-2)^2$

$y=-3\times4$$y=-12$

We get the point (-2,-12).

Set x=-1 and substitute in the equation to find the value of y.

$y=-3(-1)^2=-3$

We get the point (-1,-3).

Set x=0 and substitute in the equation to find the value of y.

$y=-3(0)^2=0$

We get the point (0,0).

Set x=1 and substitute in the equation to find the value of y.

$y=-3(1)^2=-3$

We get the point (1,-3)

Set x=2 and substitute in the equation to find the value of y.

$y=-3(2)^2=-12$

We get the point (2,-12).

Mark the points (-2,-12), (-1, -3), (0,0), (1,-3) and (2,-12) on th egraph and join all the point by curve.

The graph is