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4|x| = vertical stretch of 4
standard absolute value |x| values
x y 4y
-3 3 12
-2 2 8
-1 1 4
0 0 0
1 1 4
2 2 8
3 3 12
Vertical affects y values, so multiply y values by 4
New co-ordinates
(-3,12) / (-2,8) / (-1,4) / (0,0) / (1,4) / (2,8) / (3,12)