X- (input)
Y- (output)
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Is this mapping a function and how can you tell

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Vinny is interviewing for a job.he wants his take home pay to be at least $42,000.what is the least salary he can earn if he pays 25% income tax?

Over the last 4 seconds, a snail has traveled 4/9 of an inch. if the snail traveled the same distance each second, how far did it travel each second?