Question

please help question in picture line
http://gyazo.com/f539166daac2201543a29cbeee678391

Answer 1

and the last to options are 6 and 8

Answer 2

find the number of houses sold in day 10
find the number of houses sold in day 2
subtract the first number minus the second number; call this difference the "change in y"

day 10 is 10
day 2 is 2
subtract the first number minus the second number; call this difference the "change in x"

divide (change in y) / (change in x)

Answer 3

\(\bf slope = {\color{green}{ m}}= \cfrac{rise}{run} \implies
\cfrac{{\color{blue}{ y_2}}-{\color{blue}{ y_1}}}{{\color{red}{ x_2}}-{\color{red}{ x_1}}}\implies \cfrac{f(10)-f(2)}{10-2}\impliedby \textit{rate of change}\)