Question

Can someone please help me with this question

What is the range of the function f(x)=3x+1 when the domain is {0, 1, 2}?

a.{2, 4, 10}


b.{1, 4, 7}


c.{3, 4, 5}


d.{2, 6, 18}

Answer 1

B. {1,4,7} is the answer

Answer 2

B) [1, 4, 7]

Explanation:

Substitute 0 in

f(0) = 3(0) + 1

Multiple

f(0) = 0 + 1

f(0) = 1

Substitute 1 in

f(1) = 3(1) + 1

f(1) = 3 + 1

f(1) = 4

Substitute 2 in

f(2) = 3(2) + 1

2 = 6 + 1

f(2) = 7