Aminer descended 1200 feet into a mine. while in the mine, he then rose 450 feet and then descended 150 feet. what was the miner's net gain or loss in altitude?

–900 ft

600 ft

1500 ft

–1500 ft

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

srry idk

step-by-step explanation:

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,