The two variables present here would be the value of the car, and the time is depreciates for. Time is the independent variable, because it is not affected by the value of car. Since the value of the car is a function of the time, therefore, it is the dependent variable.
Answer:
Alex timed 7 by 2 instead of 7 times 7 because 7^2 is an exponent.
You have to multiply first and then be a bad bleep
The answer is 45 when you substitute all the variables in