Mrs. gitterman gave a quiz to each of her three math classes. Each of her classes have 12 students. When she found the mean for each class, she was surprised to see that the mean for each class was 80%. However looking at individuals scores, she found that the distribution of scores in each class looked very different.

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)

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute: