Algebra :please answer #6 and show work

Y=mx+b
find slope by doing
slope=(y1-y2)/(x1-x2)
ponts (5,36) and (4,29)
x1=5
y1=36
x2=4
y2=29
subsitute
(36-29)/(5-4)=7/1=7
slope is 7
subsitute
y=7x+b
subsitute 5,36 or 5 for x and 36 for y
36=7(5)+b
36=35+b
subtract 35 form both sides
1=b
y=7x+1 is the answer which is the first one