# Finding Average Rate of Change Help

#### NK8485

##### New member
I feel like this is really simple but I just can't figure it out. I'm not sure which numbers to plug in where.

What is the average rate of change of g(x)=2x-3 between the points (-2,-7) and (3,3)?

How would I go about solving this?

#### Subhotosh Khan

##### Super Moderator
Staff member
I feel like this is really simple but I just can't figure it out. I'm not sure which numbers to plug in where.

What is the average rate of change of g(x)=2x-3 between the points (-2,-7) and (3,3)?

How would I go about solving this?

Average rate of change of f(x) between x1 and x2 is = [f(x2) - f(x1)]/[x2 - x1]

Please share your work with us ...even if you know it is wrong

If you are stuck at the beginning tell us and we'll start with the definitions.

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#### stapel

##### Super Moderator
Staff member
What is the average rate of change of g(x)=2x-3 between the points (-2,-7) and (3,3)?

How would I go about solving this?
When you're driving, your "average rate of change" in position is your average speed. If you were given your start time, your end time, and the distance you'd travelled, how would you find the average speed?

Follow the same sort of process here.