Graph y = -­4x2 ­- 2 and its inverse

The function and it's inverse are graphed in the attached diagram.

For  y -intercept is . This implies







For x-intercept, , This means that,





The above equation tells us that, the above equation has no real roots. Hence the graph has no x-intercept.

Also the value , tells us the graph is a maximum graph.

THE INVERSE OF y



Interchange x and y.



Make y the subject to obtain,

.

for x<-2.

You can now find the intercepts, with some few points to graph the inverse.

6(2x + 5y)6 (2x) = 12x6 (5y) = 30y12x + 30y