Y=mx+b The m in this equation is equal to the slope of the function while the b equals the y-intercept. However, because the intercept is at zero, the b in the equation is excluded. y=mx Now in order to find the slope(m) of the equation, we will use the slope formula in order to find it. The slope formula is this: (y2-y1)/(x2-x1) So the slope formula when we use the points (1,8) and (2,16) is: (16-8)/(2-1)= 8/1= 8 Now, that we have the slope, we can plug it into our equation: y=8x And there is your answer. Hope this helps you!