Question

The slope of the line below is 2. Which of the following is the point-slope form

of the line?
(1,-1)

A. Y+1 = -2(x - 1)
B. y-1 = 2(x+1)
c. y-1 =-2(x+1)
D. y+ 1 = 2(x-1)​

Answer 1

Y-(-1) = 2(x-1)

Y+1 = 2x-2

Y= 2x-3

Hope this helps!

Answer 2

D

Explanation:

point-slope form is y-y1=m(x-x1) . since the slope is 2 and not -2, you can automatically eliminate choices A and C. since the y-value in the point, (1,-1), is -1, you will add it to y because you are subtracting a negative. (- - = +) therefore, the final equation, in point-slope form, is y+1=2(x-1), or answer choice D.