(1,3) , (2,7), and (3,11): Let's find the slope m between (1,3) and (2,7) Slope = Rise / Run m = (7-3) / (1) m = 4.
Our equation y=mx +b has a slope of 4. Since C is the only option that satisfies this, we already know the answer, but let's find the y-intercept. y = mx + b. Plug in 4 for m, and the first coordinate (1,3) for x and y 3 =4(1) + b Subtract 4 from both sides b = -1 Our function is y =4x - 1 Answer is C) y=4x-1
