Question

How do I write y=2x-7 in function notation?

Answer 1

f(x)=2x-7

Answer 2

I guess f(x) = 2x - 7

Answer 3

Thats it?

Answer 4

yup

sometimes people like to write
y= f(x) = 2x - 7

Answer 5

Oh wow, I didnt think it was that easy. Thanks!

Answer 6

I asked the same question when I read yours. Thats it? :P haha.

Yes but...it´s just...notation.

Answer 7

well so long as you understand why

y is a function of x

so y=f(x)

but since y = 2x - 7

therefore f(x)=2x - 7

Answer 8

but be on the look out cuzz i am pretty sure they will throw a hard one at you where y isn't defined explicitly for x

something like

2=2x+y

in that case y is not in terms of x

so solve for y

y=2-2x

now you can write
f(x)=2-2x

just a wee sample.

Answer 9

Awesome, Thanks! @Marrioncito They took away the ability to give multiple medals :(

Answer 10

Thats Right

Answer 11

No problem, I´m not here for the medals. =)

Answer 12

I just joined 3 days ago. SO i not sure about medals but no one into math is ever rarely in it for medals :P