Tori, this is the solution to the exercise:
Step 1: Let's remember that this is a case that we can solve using the following equation form:
y = mx+b, where m is the slope and b is the y-intercept.
Step 2: Solving for b:
y = mx + b
We replace x and y with the coordinates:
1 = 3 * 2 + b
1 = 6 + b
b = 1 - 6
b = - 5
Step 3: Therefore, the equation of the line that passes through the point (2,1) with a slope of 3 is:
y = 3x - 5