### Home > CALC > Chapter Ch7 > Lesson 7.1.1 > Problem 7-6

7-6.

Chain Rule.

The equation for the tangent line is *y* − *y*(3) = *y*'(3)(*x* − 3).

Implicit Differentiation.

Translation: Evaluate the 2nd-derivative (that you found in part (e)) at *x* = 3.

Is the graph concave up or concave down?