Question about linear functions?

Question

Okay, please help me and show me step by step how to figure this out so i can do it on my other problems that i have just like this one It says:

Decide whether the function is linear. Then evaluate the function for the given value of x

f(x)=x-11; f(4)

How do you tell if it's linear

and please work out the problem but don't skip any steps and please show me everything to do I'd really wish to understand!

Answer 1

A function is linear if the exponent of the x (the little flying number) is one. When you graph it, the line is a straight line.

As for evaluating, you just plug in the number (in this case 4) into the equation ... like so...

f(x) = x - 11

f(x) = 4 - 11

f(x) = -7

That means that your answer is - 7.

Good luck.

Answer 2

its linear if each "x" has only one "y". if there is x^2 [[exponent]] then its not linear.

f(x)=x-11; f(4)

f(x)=4-11

f(x)=-7

you put the f(4) into each place where you see an "x"

HEYY i gota question. umm, i was doing my homework earlier, after i answered this question. and i had the same problem in my book. do you go to WMHS??

Answer 3

f(x) just means y

so imagine it as y=x-11 and you might find it easier

linear means it would make a straight line on a graph which it would because there are no powers involved for example 2squared. =D capsico?