Question 147226
Different-sized reantal trucks cost $19.99,$29.99,or $39.99 plus $0.10 per mile. Equations are for the total erntal cost,C, in dollars, for x miles driven.
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You basically have three different trucks that rent for a different cost:
If 'x' is "miles driven":
Then for the $19.99 truck:
C(x) = .10x + 19.99 
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Then for the $29.99 truck:
C(x) = .10x + 29.99 
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Then for the $39.99 truck:
C(x) = .10x + 39.99 
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Notice for each of the equations above, they are in the format of the "slope intercept" form of a line:
y = mx + b
where
m = slope
b = y-intercept
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Notice that the "slope" (m) of each of the three equations are the same -- therefore, all three lines will be parallel.
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