The numbers that are in the range of the function are 130, 140, 160 and 180.
Since the function is C(x) = 100 + 5x and the domain or input are 6, 8, 12 and 16, the numbers that are in the range of the functions are numbers we get when the input the individual values of x into the function.
Range of the function
So, when x = 6, C(6) = 100 + 5(6) = 100 + 30 = 130
when x = 8, C(6) = 100 + 5(8) = 100 + 40 = 140
when x = 12, C(6) = 100 + 5(12) = 100 + 60 = 160
when x = 16, C(16) = 100 + 5(16) = 100 + 80 = 180
So, the numbers that are in the range of the function are 130, 140, 160 and 180.
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