Without an equality sign the given terms can't be considered to be an equation of a straight line.
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Without an equality sign the given expression can't be considered to be an equation.
79
(5, -8)
Substitute the x coordinate into the equation for x and calculate y. If the formla gives the same y value as the coordinates, the point is on the line. If it is diffent, it is not on the line.
If you mean: y -3 = 2(x -1) then y = 2x+1 and the point was (1, 3)