Question

F(x) = 2x-4
function table

Answer 1

Answer: This is a function.

Step-by-step explanation: Simply input any real number into x and solve for the y part.

Answers in picture.

Answer 2

so lets have 4 domains meaning what x could be 3,6,10,20

Explanation:

so you must replace the x's with that number

so x=3

f(3)=2(3)-4 2*3=6 6-4=2 so f(3)=2

y is 6

f(6)=2(6)-4 2*6=12 12-4=8 so f(6)=8

y is 8

x=10

f(10)=2(10)-4 2*10=20 20-4=16 so f(6)=16

y is 16

x=20

f(20)=2*20-4 2*20=40 40-4=36 so f(20)=36

y is 36