The formula for a line is:
Y = mX + b
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Points: (20, 18) and (35, 6) Slope: -4/5 Equation: y = -4/5x+34
It is: y = 5x+6
Points: (5, -2) and (4, 3)Slope: -5Equation: y = -5x+23
This starts with the collocation circle to go through the three points on the curve. First write the equation of a circle. Then write three equations that force the collocation circle to go through the three points on the curve. Last, solve the equations for a, b, and r.
You write it as: y = 5x-4 Then you calculate a few sample points, plot them, and draw a straight line through them. Since the equation is linear, two points are enough, in theory, but it is usually recommended to plot a third point, as a verification.