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it represents how much the number inside of it is away from 0 ex. |-4| is 4 because -4 is 4 away from 0 not -4 away from 0 because that would make no sense.
That is the value called the y intercept - value of y when x = 0 for example if y = 3x + 4 b = 4 and y = 4 when x = 0
Then the answer is straightforward - 0 When a numerator is zero it means that the value of the fraction is also 0. For example: there are 0/4 pieces of pie The numerator is 0 (the top number) The denominator is 4 (the bottom number) The value of the fraction is 0 because the numerator is zero (there are no pieces of pie)
depends, when c>0, yes. when c=0 it's equal 4*0=0 and when c<0 it is smaller, because c=4: 4*-2=-8 and -8 is smaller than -2