For this case we have that by definition, the equation of a line in the slope-intersection form is given by:

Where:
m: It's the slope
b: It is the cut-off point with the y axis.
According to the statement data we have:

Thus, the equation is of the form:

We substitute the given point and find the cut-off point:

Finally, the equation is:

We manipulate algebraically to obtain the standard form:
We multiply by 3 on both sides of the equation:

We multiply by -1 on both sides:

Answer:
