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Algebra 15 Online
OpenStudy (anonymous):

Time (hours) Cost (dollars) 1 180 2 240 3 300 4 360 5 420 6 480 7 540 8 600 The table gives the cost for renting a limousine from Grey’s Limousine Rental. Which equation represents the company's fare structure, based on the amount of time it is rented? y = 60x y = 120x + 60 y = 60x + 120 y = 75x + 60

OpenStudy (anonymous):

@welshfella

OpenStudy (anonymous):

Are you familiar with how to find the equation of a line?

OpenStudy (anonymous):

y=mx+b

OpenStudy (anonymous):

first find m which is the slope

OpenStudy (anonymous):

pick 2 points and use rise/run

OpenStudy (anonymous):

(240-180)/(2-1)

OpenStudy (anonymous):

m=60

OpenStudy (anonymous):

so far we have y=60x+b

OpenStudy (anonymous):

now we find what b is by plugging in a point for x and y

OpenStudy (anonymous):

180=60(1) + b

OpenStudy (anonymous):

b=120

OpenStudy (anonymous):

This means that the equation is y = 60x + 120

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