Use signed numbers to solve.

a helicopter rose 2400 feet, descended 1650 feet, and then descended another 725 feet. what was the net gain or loss in altitude?

a.
gained 25 ft

b.
lost 750 ft

c.
lost 25 ft

d.
gained 750 ft

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,

17

step-by-step explanation:

51/3=17

thus 17 is your answer.