25 36 _ 64 81 _
for #1 it is y=-3/2x+4 the -3/2 is the slope and the 4 is the y intercept
for #2 it is y=6/+2 the 6/2 is the slope and the 2 is the y-intercept
the y-intercept is where the line passes through the y axis
b) ÷
IT IS VERY EASY