Question

how to graph y=f(x)+2
with this graph http://mathgraphs.com/plg5e/plg5emg01d01001.pdf

Answer 1

add 2 to every y value

Answer 2

you get the same curve, but slid up 2

Answer 3

so it would be 2=f(x)+2?

Answer 4

they want you to graph y= f(x)+2
that means put dots on the graph at certain points.
For example, you put a dot at x= 0 y= -1+2=1
that is 2 up from where the original dot is.
then connect the dots

Answer 5

i see what your saying. but do i use the points given to me or do i choose my own?

Answer 6

the instructions say use the graph of f. So you have to use f(x)
that means find where the dot is for x=0 (it is at y=-1), add 2 to the y value, and plot it.
that is what y= f(x)+2 means.
Do it for every x where f(x) has a dot

Answer 7

okay i see. thank you very much

Answer 8

x is always constant correct

Answer 9

you do not change the x, just the y value.

Answer 10

okay. im doing y=-f(x) using the same graph
so with (0,1)
x=0
y=-(-1) ?

Answer 11

correction *with (0,-1)

Answer 12

OK, that's right.
you should get a graph that slopes down

Answer 13

would it not be the same as the original though

Answer 14

how can it be the same when you are changing it? plot it and see.

Answer 15

the points come out on the same line as the first equation (y=f(x)+2)

Answer 16

what points did you get?
here are the first two pair:
original new
0,-1 0,1
1, 0 1,0

Answer 17

i got the same thing also. i guess i am just confusing myself

Answer 18

what did you get for the rest of the points?

Answer 19

(3,-1),(4,-2)
i get it now

Answer 20

thank you