Our teacher gave us some extra challenge questions and I've solved them all except for two, which has been really bugging me:(adsbygoogle = window.adsbygoogle || []).push({});

1) Determine the equation of a line that passses through (2,2) and is parallel to the line tangent to y=-3x^3-2x at (-1,5)

2) estimate the instantaneous rate of change of the surface area of a sphere with respect to its radius when the radius is 10cm.

I don't want to know how to solve them but just a bit of help to get me along on my own would be nice. Thank you.

EDIT: I just realized I put this in the wrong thread. Is it possible to move it to the Intro Calculus thread? Thank you.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Calculus Rate of Change Help

**Physics Forums | Science Articles, Homework Help, Discussion**