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Question 1005605: This equation can be used to determine the resale value, y, in dollars,
of a car x years after purchase.
y =2,800x+ 20,000
What is the meaning of the x-intercept of a graph of this equation?
A. the initial purchase price of the car
B. the change in the value of the car each year
C. the amount of decrease in the value of the car
D. the number of years after purchase when the car has no resale value
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! This must be y= -2800x+20,000, because the resale value of a car decreases over time, doesn't appreciate.
The x-intercept is when y=0, and 2800x=20,000
x= 7.1428 and that means the resale value is 0 after 7.14 years.
The initial purchase price of the car is $20,000, when x=0
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The amount the car's value changes is $2800 less each year, using the equation above.
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The amount of decrease in the value of the car is $2800x, where x is the number of years.
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The car has no resale value after 7.14 years (above), and that is the x-intercept.
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