Answer:
y = 3x
Step-by-step explanation:
in y=mx+b, we must find the slope and the y intercept.
The line goes up 3 units and over one unit, therefore the slope (rise/run), is equal to 3/1 or just 3. The line's y-intercept is just at zero, therefore the equation of the line is:
y=3x+0,
or just y=3x!
