Question 380964
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Hi,
Using the point-slope formula, {{{m =(y[2] - y[1])/(x[2] - x[1])}}}
(-7, -6) and (-4, -8)
 m = [-8 -(-6)]  / [-4 - (-7)]  = -2/3
Using the standard slope-intercept form for an equation of a line y = mx + b  
where m is the slope and b the y-intercept
y = (-2/3)x + b Using ordered pair Pt(-4,-8) to solve for b
-8 = (-2/3)*(-4)  + b
-24/3 - 8/3 = b
 -32/3 = b
y = (-2/3)x  - 32/3
{{{drawing(300,300, -10,10,-10,10,grid(1),
circle(-7, -6,0.4),
circle(-4, -8,0.4),
circle(0, -32/3,0.4),

graph( 300, 300, -10,10,-10,10,(-2/3)x  - 32/3))}}}