In order to solve, we replace the values of x in the functions in at least two points, we then compare if the answers correspond with the y-components. From this, we will have that the function that models the table is:
The table looks like this:
x = 0 => y = 3(0) = 0
x = 1.3 => y = 3(1.3) = 3.9
x = 5 => y = 3(5) = 15
x = 8 => y = 3(8) = 24