I will be happy if you will help me please.

The equation is

**y = -1.2x + 180**, and it looks like this:

And I have to find a tangent equation at point (100, 60), it should look like this:

I tried to find a tangent equation (The graph of a tangent equation should be as curved as a parabola) and I got this:

It's good, but one problem - The parabola is below a straight line.

How do I find a tangent equation?

Thanks!