A function will not have any repeating x values...u can have repeating y values, just not the x ones. Now look at ur x values (2,3,4,5)...no repeating numbers...their all different...means this IS a function.
f(h) = 15h + 5
f(8) = 15(8) + 5
f(8) = 120 + 5
f(8) = 125 <== this is basically saying, that for working 8 hrs, Kylie earned $ 125.
f(r) = 15r + 5.....input (r) = 3
f(3) = 15(3) + 5
f(3) = 45 + 5
f(3) = 50....output ...f(3) = 50
ordered pair is : (3,50)
