Question

find the slope and y-intercept of f(x)=-5-9

Answer 1

Is there supposed to be an x in the problem?

Answer 2

let me make sure

Answer 3

oh yes. f(x)=-5x-9. ty

Answer 4

np.

The slope is always the coefficient of the x term.

The y-intercept occurs when x=0...if you plug 0 in for x, the entire x term goes away and you're lef twith the y-intercept.

Note that to be correct, you will need to give the y-intercept as an ordered pair. It would be (0,?) where ? is the answer you get when plugging in x=0

Answer 5

ok let me see if I get this correct. im not good with graphing. is it 0?

Answer 6

Neither is 0. Look at the coefficient of the x term. That is, the number in front of the x. That is your slope.

Now, because you're function is in the correct form (point-slope form of a line), you can just cover up the -5x to get the y-intercept value. Because when x=0, -5x=0. So what are you left with?

Answer 7

ok is it slope is -5 and y is 9?

Answer 8

Very close. The slope is correct, but the y-intercept is actually -9. The minus sign stays with it.

As I was saying in the note, however, the y-intercept is really a coordinate pair. But it is always (0, b) where b is the -9 you found. So in actuality, the y-intercept is (0,-9)

I think you've got it now :)

Answer 9

yay so the slope is -5 and the y intercept is (0,-9)

Answer 10

Quite right! ^_^

Answer 11

thanks soo much

Answer 12

you're very welcome.