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**1. Homework Statement**

Find a unit vector that is (a) parallel to and (b) normal to the graph of f(x) at the given point. Then sketch.

f(x)=x^2

point=(3, 9)

**2. Homework Equations**

None that I'm aware of.

**3. The Attempt at a Solution**

Find parallel or perpendicular lines, planes, vectors, etc. to a given function has always been a problem for me. I never know where to start. Is it a matter of slope? If so, then how?