Find the echelon form of this augmented matrix, written so there are 1's on the diagonal. 1 2 2 300 2 -35 800 1 1 800 1 ​

goog may have it for you

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

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,

i think it might be a but you might want a second opinion