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The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her $410 to drive 300 mi and in June it cost her $470 to drive 600 mi. (a) Express the monthly cost C as a function of the distance driven, d, assuming that a linear relationship gives a suitable model. (b) Use part (a) to predict the cost of driving 1200 miles per month. (c) Draw the graph of the linear function. What does the slope represent?

  • Calculus -

    Where are you stuck Ethan? Show me what you have so far and I'll point you in the right direction.

    Hint: Draw a graph for yourself, designate the x axis as miles and the y as dollars. So when x is 300 what is y? And when x is 600 what is y? This might help you understand the question.

  • Calculus -

    I'm stuck at part a, I don't know what the function would be

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