Suppose that :
A = ( 5 , 0 )
B = ( - 5 , 4 )
Then we have :
Slope = [ y(B) - y(A) ] ÷ [ x(B) - x(A) ]
Slope = [ 4 - 0 ] ÷ [ -5 - 5 ]
Slope = 4 ÷ ( - 10 )
Slope = - 4/10
Slope = - 2/5
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It's time to find the formula of this linear function using following formula :
y - y ( A or B ) = Slope × ( x - x ( A or B ) )
I'm gonna using point A but u can do it with point B which will gave the same answer :
y - 0 = - 2/5 × ( x - 5 )
<em>y = - 2/5 x + 2</em>
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We have the formula of the function now thus it's time to find two more points that line passe through ;
To do that we just have to put two desired values of x instead of it and find the y to have the coordinate of those points that line passes through :
I'm gonna use x = - 10 and x = 15 :
x = - 10 x = 15
y = - 2/5 × ( -10 ) + 2 y = -2/5 × ( 15 ) + 2
y = 4 + 2 y = - 6 + 2
y = 6 y = - 4
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Thus ( -10 , 6 ) & ( 15 , - 4 ) are two other points that line passes through.