The cost of renting a chain saw is $3.75 per hour plus $7.50 for a can of gas which is modeled by f(h) = 3.75h + 7.50. Find the
cost of using the chain saw for 4.5 hours.

$24.38

Step-by-step explanation:

f(h) = 3.75h + 7.50

h = 4.5

f(4.5) = 3.75(4.5) + 7.50

f(4.5) = 24.375

$24.38

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)