# Average Rate of Change

• Oct 28th 2009, 12:59 PM
yellowstar1
Average Rate of Change
Can anyone help with advice on how to complete the following problem?

Find the average rate of change for g(x) = the square root of (5-x) from x1 = -4 to x2 = 1

My book has examples, but none of the problems follow this pattern, and I'm very confused!

Thanks so much.
• Oct 28th 2009, 01:54 PM
pickslides
$\frac{g(x_2)-g(x_1)}{x_2-x_1}= \frac{\sqrt{5-x_2}-\sqrt{5-x_1}}{x_2-x_1} = \frac{\sqrt{5-1}-\sqrt{5-(-4)}}{1-(-4)}$