It's how far a number is from 0.
( ex.) 6 is 6 away from 0 but so is -6; so the absolute value of 6 is 6 and the absolute value of -6 is 6. the symbol "|" is placed on either side to mean absolute value.
(ex.2) |-6| = 6. -|-6|= -6. |6|=6. and -|6|= -6.
if the negative sign is outside of the symbol then the number will always be negative but if there is no negative sign outside of the symbol it will always be positive, even if it looks lile this. |-6| it would still be positive.
If you mean find the y intercept:
y= 5x - 6
so in order to find the y intercept just substitute x with 0 so you get:

Answer:
y = -6 or
(0,-6)
The answer is $2267.25
30.23*75=2267.25
It depends on what the shape is