Kenneth S. answered • 12/08/16
Tutor
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(62)
Let's cut to the chase: I know this subject & how to teach YOU
Begin with the V-shaped graph of x = |y| on translucent graph paper where your HORIZONTAL AXIS is labeled y.
Shift the graph one space toward the right so that the point of the V is where y = 1.
Multiplying by 2 makes a 'tighter' V shape, with each vertical coordinate doubled (remember, these vertical coordinates are x's).
Multiplying the above result by -1 inverts the tight V shape so that it's now upside down (reflected in the horizontal Y axis).
Adding 1 now lifts all points up by 1 unit.
Now turn the paper over and rotate it so that the former y axis is now running vertically, and its positive values run UP the paper.--thus giving you a RELATION with the x & y axes in conventional orientation.
