On valentine’s day, 180 students wore red or pink colored shirts. there are 240 students in the school. what percent of students wore either red or pink colored shirts?
a. 70%
b. 80%
c. 65%
d. 75%

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

ratio is 2 : 9

the answer is three

13.5 : 3

804.75

step-by-step explanation: