The standard form equation for a line is give by:
y = mx + b
Where:
m is the slope of the line
b is the y-intercept (the point where the line crosses the y-axis, this is when x is equal to 0).
Let's find m from the point-slope equation:
m = y2 - y1
x2 - x1
x1 = 2
x2 = 2
y1 = 3
y2 = -1
m = -1 - 3
2 - 2
m = -4/0
m = 0
So let's pick either points and plug it and the slope (m) into the standard form equation.
y = mx + b
3 = 0 * 3 + b
3 = 0 + b
3 = b
b = 3
y = x + 3