Question

The points (1,5), (5,10), (7,8), and (8,1) are on the graph of the function p. Which expression belo gives the average rate of change of the function p on 5 less than or equal x less than or equal 8

Answer 1

Explanation:

Since it is x that is bound by 5≤x≤8, you should use the points (5,10) and (8,1), since a coordinate is written as (x,y).

Then, use the formula for slope, as the average rate of change means find the slope,
`(y2-y1)/(x2-x1)`

thus, plug in

`(1-10)/(8-5)`, and you get -9/3, or -3. :)