Question

Find the range of the function for the values given. A merchant uses the rule f (c) = (2 × c) + 1 to set his selling price.

c 1 2 3
f(c)

Answer 1

f(c) = (2 * c) + 1

when c = 1
f(1) = (2 * 1) + 1
f(1) = 3 <== range

when c = 2
f(2) = (2 * 2) + 1
f(2) = 5 <== range

when c = 3
f(3) = (2 * 3) + 1
f(3) = 7 <== range

range (all the f(c)'s) = {3,5,7}