The line shown in the image passes through the points (1, 2) and (2, 4).
It's given the form of the equation is:
y = mx
We need to calculate the value of m. We only need one point to do so. Let's use (1, 2) and substitute in the equation:
2 = m (1)
Solving for m:
m = 2
Thus, the equation of the line is:
y = 2x
Note: If we had used the other point, we would have obtained the very same value of m = 2
