<u>Given</u>:
The equation of the line passes through the point (1,1) and having a slope of 3.
We need to determine the equation of the line.
<u>Equation of the line:</u>
The equation of the line can be determined using the formula,
Substituting the point (1,1) and the slope m = 3 in the above formula, we get;
Simplifying the terms, we get;
Adding both sides of the equation by 1, we get;
Thus, the equation of the line is
Hence, Option C is the correct answer.