Isaac wants to join a gym. he checked out the membership fees at two gyms.
gym a charges a new member fee of $65 and $20 per month.
gym b charges a new member fee of $25 and $35 per month, but isaac will get a discount of 20% on the monthly fee

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b