Question 662625: I need to setup linear equation for the following:A 7 mile cab ride cost $10.20, a 10 mile cab ride is $13.80. Find a linear equation that models a relationship bewtween the cost (c) and the distance (d).
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! I need to setup linear equation for the following:A 7 mile cab ride cost $10.20, a 10 mile cab ride is $13.80. Find a linear equation that models a relationship bewtween the cost (c) and the distance (d).
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You have 2 points (7,10,2) and (10,13.8)
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slope = (13.8-10.2)/(10-7) = 3.6/3 = 1.2
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Form: y = mx + b
You know y = 10.2 when x = 7 and m = 1.2
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Solve for "b":
10.2 = 1.2*7 + b
b = 1.8
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Equation:
y = 1.2x + 1.8
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Cheers,
Stan H.
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