The highest point in the United States is Mt. McKinley at 20,230 feet. The lowest point is -282 feet at Death Valley, California. Find the range between the highest and lowest points.

i can't see the picture : /

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

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dfj dt

step-by-step explanation:

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