SOLUTION:
We are to write the equation the equation of the line in the form y = mx + b.
From the information given in the question, the slope = -3 and y - intercept = 0.
In the formula above, m is the slope and b is the y intercept.
CONCLUSION:
The equation of the line with slope of -3 and y - intercept of 0 is y = - 3x.