1. Y= -3/4x - 2
2. Y= 5/6x + 8
$6.36
you have two digits in the cents place, so your third decimal would be the factor that rounds up or down, since the number is above 5 you round up
slope = m=(y2-y1)/(x2-x1)
m= (4-5)/(1-(-2))
m= -1/(1+2)
m=-1/3
Choice C