Question 337665
Conundrum?
There is a formula, you know. 
It was worked out hundreds of years ago, just use it. 
Use the point-slope form of a line and convert it to slope-intercept form,
{{{y-yp=m(x-xp)}}}
{{{y-(-2))=(3/7)(x-(-1))}}}
{{{y+2=(3/7)(x+1)}}}
Now convert it to slope-intercept form to complete the problem.