Question

Instructions: Write the equation of the line in Point-Slope Form given the information below.

Slope = -2
Point
(1,-1)
Point-Slope Form:
=

Answer 1

y + 1 = - 2(x - 1)

Explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b ) a point on the line

here m = - 2 and (a, b ) = (1, - 1 ) , then

y - (- 1) = - 2(x - 1) , that is

y + 1 = - 2(x - 1)

Answer 2

y = -2x +1

Explanation:

Given the slope and one of the points we can write the equation of line.

we assume one of the points is (X,y)

slope =∆y/∆x

-2 = y+1/x-1

we cross multiply

-2(x-1) = y+1

-2x +2 = y+1

y = -2x +1