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f(x) + a
translates up by a units; (x, y+a)
f(x) - a
translates down a units; (x, y-a)
f(x -a)
translates right a units; (x+a, y)
f(x+a)
translates left a units; (x-a, y)
f(-x)
horizontal reflection over y axis;
(-x,y)
-f(x)
vertical reflection over x axis; (x, -y)
af(x), for a>1
vertical stretch by a factor of a; (x, ay)
af(x), for 0<a<1
vertical shrink by a factor of 1/a; (x, ay)
f(ax), for a>1
horizontal shrink by a factor of a; (x/a, y)
f(ax), for 0<a<1
horizontal stretch by a factor of 1/a;(x/a, y)