Question

Which of the following is an equation of the line that passes through the point (1, 1) and has a slope of 2?




A.

y = 2x – 1


B.

y = 2x + 1


C.

y = –2x – 1


D.

y = –2x + 1

Answer 1

Y-Y1=m(x-X1)
sub each term with its value so you get
y-1=2(x-1)
y=2x-2+1
y=2x-1 matches with A

Answer 2

equation should be (y-1)=2(x-1) so y-1=2x-2--> y=2x-1...this is called slope intercept form