# Math Help - Average rate of change

1. ## Average rate of change

How do you find the average rate of change of f(t)=-16t^2+320t+6 from 1 to x?

I've used the msec equation, but am afraid I did something wrong. I've gotten to the factoring part but it isn't working out.

2. What is "the msec equation"? (I believe this term is specific to your text.)

When you reply, please show all of your steps so far. Thank you!

3. Sorry about that,

$m_{\text{secant}} =\frac{f(t)-f(c)}{t-c}$