Hi

Using the point-slope formula, 

(-10,-12) and (-17,-19)

m = -19-(-12) / -17-(-10) = -7/-7 = 1

m = 1

the standard slope-intercept form for an equation of a line y = mx + b  

where m is the slope and b the y-intercept

equatin of this line

y = 1*x + b  using ordered pair(-10,-12) to solve for b

-12 = -10 + b

-2 = b

y = x -2  is the equation of the line



 

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