Mr. ochaeta is marking up all the prices of a basketball that costs 40$ is marked up to a new price of 45$. by what percent did mr. orcheata mark up the price?

a: 1.25%
b: 88.8%
c: 8%
d: 12.5%

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

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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