Question

http://prntscr.com/h80i1x

Answer 1

@Hero

Answer 2

What was the answer you put for \(f(-1)\)? I cannot see it clearly on my end.

Answer 3

-1

Answer 4

Negative One

Answer 5

@Hero

Answer 6

Mind explaining how you arrived at -1 as your choice?

Answer 7

well x = x-intercept
and f(x)
f(-1) so x = -1

Answer 8

So when dealing with the input, x and output, y, of the graph of a function at a point, we use equation y = f(x). So, the x and the y in the equation refer to points.

Answer 9

So when you are given something like f(-1) = (blank), what they really asking of you is simply this:

"What is y when x = -1?"

Answer 10

That's it. They're giving you this (x,y) = (-1, b) and asking you to give them the b value. The b value corresponds to the output value, y, of a particular point of the function.

Answer 11

so what does b equal when x = -1

Answer 12

It is not difficult at all. Here's a question, which point includes -1 as the input value?

Answer 13

Is what they are asking

Answer 14

Yes, that's what they're asking.

Answer 15

1,-1

Answer 16

Now, you've confused x and y values. Remember x = -1.

Answer 17

What you've posted has y equaling to -1

Answer 18

-1,1*

Answer 19

so f(-1)=1

Answer 20

Yes, but where do you find the point (-1, 1) on the graph? Does such a point exist on the graph of the function?

Answer 21

yes

Answer 22

http://prntscr.com/h80ok5

Answer 23

wait
no

Answer 24

-1,3

Answer 25

Yes, the next thing I was going to ask you to do was mark it for me, but now you've found your own mistake.

Answer 26

And corrected it.

Answer 27

so f(-1)=3

Answer 28

Right hero?

Answer 29

yes, that is correct.

Answer 30

yay