A function with an input of 4 has an output of 10. Which of the following could not be the function equation?

y = x + 6

y = 2x + 3

y = 14 - x

y = (2.5) x

If you would like to know which of the following could not be the function equation, you can find this using the following steps:

input ... 4

output ... 10

y = x + 6 ... y = 4 + 6 = 10

y = 2x + 3 ... y = 2 * 4 + 3 = 8 + 3 = 11

y = 14 - x ... y = 14 - 4 = 10

y = (2.5) x ... y = (2.5) * 4 = 10

The correct result would be y = 2x + 3.