Imagine that you are taking a taxi while on vacation. You know that the taxi service charges $15 to pick your family up from your hotel and another
$0.25 per mile for the trip. You can set up a linear equation that can be
used to find the cost of any taxi trip you take on your trip. By using 'X' to
represent the number of miles to your destination and "y" to represent the
cost of that taxi ride, the linear equation would be
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