Complete the chart to find the mean, variance, and standard deviation. remember to use commas and round numbers to the nearest tenth.

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,

answer: #1 ads up by 8 and i don't know #2

just get this app called photo math it should be able to do those