Question

how do i write a absolute value equation? absolute value equations are the ones shaped as a v, right?

Answer 1

With these:

| |

Answer 2

thanx :)
how abt this. so basically i need to write an absolute value equation for something that the vertex is at (-2.5, 18.5) and has a slope of 1. how do i write that?

Answer 3

y=|(x+2.5)| + 18.5

Answer 4

thanks a million tropical33!!!!!!!!!!!

Answer 5

another q: with that equation (and in general) how would i figure out how to domain for a piecewise funciton?

Answer 6

Btw, remember to give a medal if someone is helpful :)

Answer 7

The domain of a piecewise function is basically all the values for which the piecewise function is specified. So if a piecewise function is valued 1 between 0 and 1, and 2 between 1 and 2, then the domain is 0 to 2.

If you post an example we can walk through it.

Answer 8

how do i give someone a medal.
the equation is y=|x+2.5|+18.5
I want it to only go up to 20 on the y axis and in bwtn -4 and -1

Answer 9

Click `Good Answer' to the right of their name in the replies :)

Ok, so if it only exists between -4 and -1, then that's the domain of the function :)

Answer 10

The domain of the function is every x value for which you want your function to exist (or, more precisely, for which your function *does* exist).

Answer 11

so i just write \[-4\le x \le -1\]

Answer 12

You got it :)

Answer 13

thanx a million!!!!!!! sorry to bother everyone again but...
is this the right equation? if i want an upside down abs value thing, with a slope of 3/2 the vertex is (2,20) i would write it y=-|3/2x+2|+20 ?

Answer 14

I don't have time right this second to draw it out and check it :/ But! Try posting it as a separate question on the left; hopefully amistre or someone else will be able to spot-check it faster than I can.

Answer 15

thx a million for all ur help!!!!!!!!!!