Question

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

y=2x-1

y=2x+1

y=-2x-1

y=-2x+1

Answer 1

y=2x -1. Given (1,1) you know equation has to to pass through it. They gave you a slope of a positive 2, so you know you have to go up 2, and 1 to the right. The best way to get the answer is by graphing the equations. you are given y=mx + b. b=y intercept and m=slope. The 3rd choke is the best answer because it passes through (1,1). Hope this helps!