The money Sky makes from babysitting is directly proportional. After 4 hours, she makes $72. How much money would she make after 7 hours? A $75
B $126
C $54
D $108

B.

Step-by-step explanation:

divide the $72 by 4 hours to get a rate of $18 an hour

multiply the $18 by the number of hours you are trying to find (7) and get a total of $126

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)

22

step-by-step explanation:

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