Question

can someone check this for me...alg2

Answer 1

@jdoe0001

Answer 2

http://www.wolframalpha.com/input/?i=plot+2*abs%28x%2B4%29+-1+plot+0.5*abs%28x-4%29%2B1

Answer 3

where did I make the mistake?

Answer 4

and this is another thing I need someone to check for me:/

Answer 5

please upload the images in a way so i dont need photoshop to read them ;)

Answer 6

I dont know how..

Answer 7

You have y=2|x+4|-1 and y=0.5|x-4|+1

on your graph you have for x=0 y=7 and y=-1
You got the 7 right but remember for the second equation you have the absolute value or |-4| which is 4 correct? Half of that would be 2 plus 1 would be 3. Your error was thinking the absolute value of a negative number is still the negative number

Answer 8

2*|-2+4| -1 = 2 * 2 -1 = 3 (not 11)
2*|-1+4| -1 = 2 * 3 -1 = 5 (not 9) etc...

0.5*|-2-4|+1 = 0.5*6 +1 =4 (not0) etc.

Answer 9

|-6| = 6

Answer 10

what @plainntall said :)

Answer 11

so it would be 2, 1, 0, 1, 2 not -2,-2,0,1,2 ?

Answer 12

can you make a new table with new numbers? so i can see it better?

Answer 13

i did that

Answer 14

but like in a table..i dont understand it that way:/

Answer 15

For y=2|x+4|-1 it would be
x -2, -1, 0, 1, 2
y 3, 5, 7, 9, 11

Answer 16

what about the second graph..

Answer 17

Because y=2|-2+4|-1=2(2)-1=4-1=3 for x=-2
You should be able to do the same thing for y=0.5|x-4|+1 making sure you remember that the absolute value is how far the number is from zero no matter if it is negative or positive

Answer 18

The second graph is y=0.5|x-4|+1 for x=-2 it will be
0.5|(-2)-4|+1 = 0.5|-6|+1 = 0.5(6)+1=3+1=4
so
x -2,-1,0,1,2
y 4, 3.5, 3, ?, ? I will leave the last two for you to practice

Answer 19

I think you understand how it works except for the absolute value. You always remove the negative sign for the absolute value.

Answer 20

Okay so is this the same thing:

2|2+4|-1 = 2(2+4) - 1 or no?

Answer 21

Yes