Question 1068590
Two choices to use:  Start from the point-slope form, or keep all steps in use as from slope-intercept form.


Keeping all in or from slope-intercept,
{{{y=mx+b}}}
{{{y-mx=b}}}
{{{b=y-mx}}}
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{{{m=(9-(-4))/(7-1)=13/6}}}
Pick a point, here using  (1,-4);
{{{b=-4-(13/6)*1=-4(6/6)-13/6=(-24-13)/6=-37/6}}}
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{{{highlight(y=(13/6)x-37/6)}}}