Question

Determine whether the function is linear. Then find the evaluate for the given value of x.
f(x)=lx+4l;f(3)
f(x)=3x-4;f(-1)
f(x)=-4x;f(8)

Answer 1

1.) No. f(3) = |(3)+4| = 7
2.) Yes. f(-1) = 3(-1) - 4 = -7
3.) Yes. f(8) = -4(8) = -32

You should start to see what the questions are asking.. linear means a straight line. f(number) simply means plug (number) into the equation.

Answer 2

I can't tell if it's linear though, so we isn't the first one linear? Because it has absolute value?

Answer 3

Right. absolute value means it will make a V shape.

Answer 4

Ok, thank you so much! I finally get it! :)

Answer 5

You're welcome! If you have any more questions just feel free to ask me.