what's the fine for a speeding ticket in the town of speed trap is $50 plus an amount that depends upon how high above the posted speed limit a driver is driving. For the first 10 mph above the posted spee limit, there is an aditional charge $5 per mph. For the second 10 mph above the posted speed limit there is an additional charge of $10 per mph.
For an area where the posted speed limit is 45 mph, express the fine amount F as a function of a diver's speed x over the interval 0 less than or equal to x less then or equal to 65

Question

what's the fine for a speeding ticket in the town of speed trap is $50 plus an amount that depends upon how high above the posted speed limit a driver is driving. For the first 10 mph above the posted spee limit, there is an aditional charge $5 per mph. For the second 10 mph above the posted speed limit there is an additional charge of $10 per mph. 
For an area where the posted speed limit is 45 mph, express the fine amount F as a function of a diver's speed x over the interval 0 less than or equal to x less then or equal to 65

anonymous · Answer

do u have a start or any work done yet on your own? can you post it up? ^_^

anonymous · Answer

I did some work but it was wrong lol thats why im asking so i can learn it

anonymous · Answer

@dalia_lam wanna help on this one?

anonymous · Answer

i'm thinking we will need to use two functions because a graph of what this situation looks something like this:
|dw:1386728304921:dw|

anonymous · Answer

|dw:1386728486659:dw|

anonymous · Answer

|dw:1386728529183:dw|