How to evaluate functions in algebra? help?

Question

The question says " evgaluate the function for these values of x: -2, -1, 0 and 1. organize your results in a table"

y=x-9

what do i do?

Answer 1

x                          y

-2                      (plug x into y) -11

-1                        -10

0                          -9

1                          -8

Answer 2

You're only in Pre-Algebra hmm? Must be a sixth or seventh grader. Ok I did this last year lol let's see if i can remember

What you do is make a t chart (i wish i could draw it for you!!)

xTy   really crappy but that's how you would set it up with the x on the left and the y on the right (just pretend the T is the chart) Then you would have the values for x stacked up under the x column. You would subtract the 9 from the value of the x. For example if you had the -2-9 it would be -11. So -11 would go in the y column and so on and so on.

BTW: something that helps REALLY well is "cross the line change the ssign." For example: -2-9. If you're having trouble with that switch the minus sign to a + and turn the 9 into a negative. But you have to do them both you can't do one without the other!! So it would look like this -2+(-9) (the paranthesis are only to show that the 9 is negative). So that helps alot. It would basically be adding like normal but you just put the "-" in front of it.

Hope I could help :-)

answer my language arts question?

http://answers.yahoo.com/question/index?...

Answer 3

Make a table with 2 columns and 5 rows.  In the first row, write x in the left column and y in the right column.

In the second row, write down -2 for x (the first thing you're given).  Figure out what y is when x is -2 by plugging in -2 for x in the equation:

y=-2-9=-11

write -11 in the right column under y

In the third row, write down -1 on the left side for x.  Plug in -1 and see what y is:

y=-1-9=-10

In the fourth row, write down 0 on the left side for x. Plug in 0 and see what y is:

y=0-9=-9

In the last row, write down 1 on the left side for x. Plug in 1 and see what y is:

y=1-9=-8

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