Question 844288
It is assumed to be a linear equation
so, it will have the form:
{{{ y = a*x + b }}}
where {{{ y }}} = monthly wages and
{{{ x }}} = monthly sales
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If there are no monthly sales, then {{{ x = 0 }}}, and
{{{ y = a*0 + b }}}
{{{ y = b }}}
This is the y-intercept where employee just gets
straight salary of {{{ 1000 }}}, so 
{{{ b = 1000 }}} and
{{{ y = 1000 }}} is the y-intercept
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The slope is the commission of 5%, so {{{ a = .05 }}}
The equation is:
{{{ y = .05x + 1000 }}}
Here's the plot:
Both axes are scaled down to thousands of dollars
{{{ graph( 400, 400, -1, 15, -1, 3, .05x + 1 ) }}}