### Home > APCALC > Chapter 8 > Lesson 8.3.3 > Problem8-132

8-132.

Multiple Choice: The equation of the line normal to the curve $y = x^4 + 3x^3 + 2$ at the point where $x = 0$ is:

1. $y = x$

1. $y = 13x$

1. $y = 0$

1. $y = x + 2$

1. $x = 0$

A 'normal line' is perpendicular to a 'tangent line' at the point of tangency. So first find the equation of the tangent line, then manipulate its slope.