Question

Consider the function represented by 9x + 3y = 12 with x as the independent variable. How can this function be written using function notation?

f(x) = ______ x + 4

Answer 1

@mathstudent55 @TheSmartOne @iGreen

Answer 2

**9x + 3y = 12**

once you get this looking like **y = [insert whatever your answer is here]** you are good to go

all the usual rules of algebraic manipulation apply.

your start point might be to divide everything by 3.

Answer 3

3x?

Answer 4

am i right ?

Answer 5

you are asked to produce an equation that reads:

f(x) = ______ x + 4

ie f(x) = (something * x) + 4

which means y = (something * x) + 4

you know that: 9x + 3y = 12

how do you make that say: y = ........ ?

Answer 6

8?

Answer 7

the answer is an equation, not a number.

you know that: 9x + 3y = 12

what does y = ?

Answer 8

3

Answer 9

2x+4

Answer 10

nah!!!

let's do this:

9x + 3y = 12

9x - 9x + 3y = 12 - 9x

3y = 12 - 9x

so y = ???

and the answer is not 2 or 7 or 27 or 5 or 999 or -26. the answer involves x.

Answer 11

y=4-3x

Answer 12

@IrishBoy123

Answer 13

so f(x) = ??