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First we need the slope which is finding from the following equation.
slope = y(B) - y (A) / x (B) - x(A)
Suppose ;
A = ( 0 , 0 ) & B = ( 10 , 5 )
Thus :
slope = 5 - 0 / 10 - 0
slope = 5 / 10
slope = 1 / 2
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We have following equation to find the point-slope form of the linear functions.
y - y(0) = s × ( x - x(0) )
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y(0) & x(0) are the coordinates of the point which line through it like A = ( 0 , 0 ) or B = ( 10 , 5 ).
s = slope
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I choose point A to put in the equation.
So :
y - ( 0 ) = 1/2 × ( x - ( 0 ) )
y - 0 = 1/2 × x - 1/2 × 0
y = 1/2 × x
y = x/2
Done....
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