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Point-slope form is y-y_1=m(x-x_1).
y=- x-1
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 ( -2,1) & ( 3,-4)
a-(- b)=a+b
Add and subtract terms
Put minus sign in front of fraction
a/a=1
Now that we know the slope of the line is -1, 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 ( -2, 1).
Since any point on the line could be used to form a point-slope equation, there are infinitely many possible equations. However, we are asked to write the equation in slope-intercept form, so this will give us a unique equation for this line.
Distribute (-1)
Multiplication Property of -1
a+(- b)=a-b
LHS+1=RHS+1
Add terms