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Use the Point-slope form. Then, rewrite into slope-intercept form.
Example Solution: y= - 1/2x
Equations in point-slope form follow a specific format.
y- y_1= m(x- x_1)
In this form, m is the slope of the line and ( x_1, y_1) is a point on the line. Here we are given that the line passes through two known points.
Substitute ( - 4, 2) & ( 6, - 3)
a-(- b)=a+b
Add and subtract terms
a/b=.a /5./.b /5.
Put minus sign in front of fraction
Now that we know the slope of the line is - 12, we can write the equation of the line in point-slope form. We can use either of the given points as (x_1,y_1) in our equation. Let's use ( - 4, 2).
Substitute values
a-(- b)=a+b
Since any point on the line could be used to form a point-slope equation, there are infinitely many possible equations. To write a unique equation for this line, we will rewrite it in slope-intercept form.
LHS+2=RHS+2
Add terms
Distribute - 1/2
(- a)b = - ab
a/c* b = a* b/c
a+(- b)=a-b
Calculate quotient
Add terms
Please note that any point on the line can be used to form a point-slope equation. Therefore, our equation is only one of infinitely many possible equations!