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, 4), (2, 9), (3, 14), (4, 19)

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

I really dont understand this problem please help! thanks :)

Answer 1

@sweetburger

Answer 2

alright so you know that F(n) can be substituted for y.

Answer 3

Yes

Answer 4

plug in (1,4) into the 1st equation substituting F(n) for y then if the 1st doesnt work try the 2nd equation that is given

Answer 5

for it to be the correct equation both sides must be equal at the end of your calculation

Answer 6

ooh ok i think i got it

Answer 7

alright let me know if you want me to check your answer

Answer 8

the first equation did not work
i am going to try the second one now.

Answer 9

alright

Answer 10

but it would be like 4=4(4)- 1

Answer 11

@sweetburger