SOLUTION: while graphing an absolute value function...the function y= abs(x)-4...setting up the table> X's> -3,-1,0,1,2,3 how do u get the y's for the table?

Algebra ->  Absolute-value -> SOLUTION: while graphing an absolute value function...the function y= abs(x)-4...setting up the table> X's> -3,-1,0,1,2,3 how do u get the y's for the table?       Log On


   



Question 924066: while graphing an absolute value function...the function y= abs(x)-4...setting up the table> X's> -3,-1,0,1,2,3 how do u get the y's for the table?
Found 2 solutions by Theo, MathLover1:
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
you evalutate the expression at each value of x and that gets you the value of y.

your equation is y = abs(x) - 4

you just substitute the value for x in the equation and solve for y.

for example:

when x = -3, y = abs(-3) - 4 = 3 - 4 = -1

when x = 3, y = abs(3) - 4 = 3 - 4 = -1

all you do is substitute the value for x in the equation that involves x.

x is the independent variable which means you choose the values of x.

y is the dependent variable which means the value of y depends on the value of x.


Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
y=+abs%28x%29-4
remember, abs%28x%29 means only how far a number is from zero, abs%283%29=3 and also abs%28-3%29=3
the table
x|y ....=>y=+abs%28x%29-4 plug in x
-3|-1 ....=>y=+abs%28-3%29-4=3-4=-1
-1|-3 ....=>y=+abs%28-1%29-4=1-4=-3
0|-4 ....=>y=+abs%280%29-4=0-4=-4
1|-3 ....=>y=+abs%281%29-4=1-4=-3
2|-2 ....=>y=+abs%282%29-4=2-4=-2
3|-1 ....=>y=+abs%283%29-4=3-4=-1

now plot points on a graph:



now draw a line through these points: