1. jeff writes comic strips for a local newspaper. the number of comic strips he creates is represented by the function f(x) = 3x, where f(x) gives the number of comic strips and x is the number of work hours he puts in, which varies day to day. if he puts in {3, 4, 6, 7, 9} work hours, how many comic strips can he write?

2. if the range of the function f(x)= 5x − 3 is {-13, -8, -3, 12, 17}, what is its domain?

3. the number of hours required to do a painting job is represented by the function f(x)=2x , where f(x) gives the number of hours and x is the number of painters doing the job. how much time will {4, 10, 14, 16, 18} workers take to do the job?