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choose a function from quest 1.

Okay, we can use the functions in parts 3 and 4 since we want to calculate how many points will be deducted for 3 falls and how many points are earned for 4 seconds on the rail trick.

Part 3 function:


He fell 3 times, so plug this in for 'x':



Multiply:



So he will receive a 4.8 point deduction for falling 3 times.

Part 4 function:


Where 'x' is the seconds he does the trick. He did it for 4 seconds, so let's plug that in for 'x':



Multiply:



Add:



So he will receive 38 points for the 4-second rail trick.