Question 823314
The slope intercept form is {{{y=mx+b}}} where m is the slope and b is the y-intercept.  They give you {{{y=5x}}} they want you to find {{{b}}}.
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{{{y=5x+b}}}
plug the point (2,-1) into the equation.  The x-value replaces {{{x}}} and the y value replaces the {{{y}}}
{{{-1=5*2+b}}}
{{{-1=10+b}}}
{{{-11=b}}}
Plug {{{b}}} back into the equation.  The equation you would get is {{{y=5x-11}}}.  This would be the slope intercept form.