Question

If a line contains both point s and the origin, which point would the line also contain?

Answer 1

The answer is y = 2x + 0 or y = 2x.

The line passes through (0,0) and (1,2). The slope is

m = (2 − 0)/(1 − 0) = 2.

(You could also see this by drawing the two points and a slope triangle and use the rise/run idea of slope.)

In the slope-intercept form, y = mx + b, you now know that m = 2 and b = 0, so the answer is

y = 2x + 0 or y = 2x.