When x=2,|x|=2. When x=-2, |x|=2. Is the relationship between x and y in the equation y=|x| linear? Is it proportional? Explain
y = l x l can actually be defined as a piece-wise function, thusly
y = -x when x = ( -infinity, 0)
y = 0 when x = 0
y = x when x = (0, infinity)
Thus.....the relationship between x and y is linear [ except when x =0 ]
