# slope of curve

• Aug 9th 2009, 07:54 AM
live_laugh_luv27
slope of curve
For $f(x)=5x^2$ at the point (2,20), find
a) slope of curve
b) an equation of the tangent line
c) an equation of the normal line

Here is what I have so far:
a) $m=20$
b) $y-20=20(x-2)$
c) $y-20=-\frac{1}{20}(x-2)$

Is my work correct? Thanks!
• Aug 9th 2009, 08:04 AM
Plato
Quote:

Originally Posted by live_laugh_luv27
For $f(x)=5x^2$ at the point (2,20), find
a) slope of curve
b) an equation of the tangent line
c) an equation of the normal line

Here is what I have so far:
a) $m=20$
b) $y-20=20(x-2)$
c) $y-20=-\frac{1}{20}(x-2)$

Is my work correct?

YES