Question

if f(x) is a linear function such that f(2)=5 and f(4)=13 then f(x)=?

Answer 1

@amriju reply plz

Answer 2

give me a minute to try...

Answer 3

F(x) is a linear function, meaning that f(x)=ax+b. F(2)=5. Meaning that F(2)=2a+b and 2a+b=5. F(4)=13, meaning that F(4)=4a+b and 4a+b=13. Now we have two equations to solve simultaneously.

2a+b=5
4a+b=13
Minus 2 from 1. Leaving:

-2a=-8
a=4
2(4)+b=5
8+b=5
b=-3

Now we know that that F(x)=4x-3

Answer 4

how cud u be sure of a linear func.. @Henry.Lister

Answer 5

cud be any func

Answer 6

Read the question.

Answer 7

:P

Answer 8

very sorry........

Answer 9

No problem.