Aballon rises 340 ft into the air, then it descends 130 ft

This is written as 340 - 130 or 340 + (-130); I don't know if you need the answer or not but it is equal to 210!

210 is your answer

Step-by-step explanation:

340-130 or 340+(-130) which is how I did it both gives you an answer which is 210.

Hope this helps you a lot!

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,