### Home > APCALC > Chapter 5 > Lesson 5.5.1 > Problem 5-158

5-158.

Let . Homework Help ✎

Write the equation of the tangent line at

. Use the Point-Slope formula.

Use

to calculate the slope at. You already know the point.Write the equation of the line normal to the curve at

. Normal lines are means perpendicular to the tangent line at the point of tangency.

Find all points on the graph of

with the same slope as in part (b).Let

*f*(*x*) = the slope in part (b). Solve for*x*. Then find the corresponding*y*-value(s). Write your answer(s) as coordinate point(s).