Question 1050081
passing through (-8,21) 
m = (-2)
y - 21 = (-2)(x + 8)  ***Using point-slope form, {{{y - y[1] = highlight_green(m)(x - x[1])}}}
y = (-2)x -16 + 21
y = -2x + 5 Blue Line
{{{drawing(300,300,   -20,20,-25,25, 
 grid(1),
circle(0, 5,0.6),
circle(-8,21,0.6),
graph( 300, 300, -20,20,-25,25,0, -2x+5))}}}