The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her $558 to drive 420 mi and in June it cost her $630 to drive 600 mi. (a) Express monthly cost C as a function of the distance driven, d, assuming that a linear relationship gives a suitable model. C(d) = $_______ (b) Use part a to predict the cost of driving 1900 miles per month. $_______ (c) Draw the graph of the linear function. What does the slope represent?
The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her $558 to drive 420 mi and in June it cost her $630 to drive 600 mi.
(a) Express monthly cost C as a function of the distance driven, d, assuming that a linear relationship gives a suitable model.
C(d) = $_______
(b) Use part a to predict the cost of driving 1900 miles per month.
$_______
(c) Draw the graph of the linear function. What does the slope represent?
1. the distance (in miles) traveled
2. the cost (in dollars) of driving
3. the cost in dollars per mile
4. the fixed cost (amount she pays even if she does not drive)
(d) What does the y-intercept represent?
1. the cost (in dollars) of driving
2. the distance (in miles) traveled
3. the cost in dollars per mile
4. the fixed cost (amount she pays even if she does not drive)
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