Show the question so I can answer it for you.
Just remember it's along the corridor and up the stairs so horizontal comes first
64 - (3y + 8y + y) / 40 = 37
Simplify 3y + 8y + y
64 - 12y / 40 = 37
Add 12y / 40 to both sides and subtract 37
27 = 12y / 40
Multiply both sides by 40
1080 = 12y
Divide both sides by 12
90 = y
Answer:
slope is the hourly rate of $110/hr
y-intercept is the set fee of 85