Question 1063260
I'll have a try.
I think you would take the equation
{{{ y = 2x + 1 }}} and transform it to:
{{{ y/2.5 = 2*( x/2 ) + 1 }}}
{{{ 2*( y/5 ) = x + 1 }}}
{{{ y = (5/2)*x + 5/2 }}}
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The x and y values are being stretched, so
the equation shows this. Here's my plot of 
both original and shifted curves:
{{{ graph( 400, 400, -10, 10, -10, 10, 2x + 1, (5/2)*x + 5/2 ) }}}