# The function y=3.5x+2.8 represents the cost y (in dollars) of a taxi ride

The function $y=3.5x+2.8$ represents the cost y (in dollars) of a taxi ride of x miles.
a. Identify the independent and dependent variables.
b. You have enough money to travel at most 20 miles in the taxi. Find the domain and range of the function.
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a. Here, the independent variable is x and the dependent variable is y as the cost of taxi ride depends on the number of miles travelled.
Independetn variable: x
Dependent variable: y
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if you have enough money to drive at most 20 miles, you would take 3.5(20) + 2.8 and end up with 72.80 dollars for 20 miles