Mx+b=y m is your slope which u can find by using two point see how far the x are and the y are then the y/x is your slope. Then he is your starting value so what y is when x= 0
The answer is -12 because the 4 and 8 are negative
$1.80, because 3/4 is half of 1.5, and $1.80 is one half of $3.60.
