Question

Malia is using an online calculator to calculate the outputs f(n) for different inputs n. The ordered pairs below show Malia's inputs and the corresponding outputs displayed by the calculator:

(1, 3), (2, 7), (3, 11), (4, 15)

Which of the following functions best represents the rule that the calculator uses to display the outputs?

f(n) = 5n - 1

f(n) = 5n + 1

f(n) = 4n + 1

f(n) = 4n - 1

Answer 1

@SolomonZelman , @welshfella

Answer 2

plug in the given values into each option and see which one fits

Answer 3

I found that when I did that I got D to be y answer since they all matched.

Answer 4

for example
first choice 5n - 1
input 1 output 3
input n = 1
output 5n - 1 = 5(1) - 1 = 4 but it should be 3 so its not this option

Answer 5

thats right its D

Answer 6

Thanks!

Answer 7

yw