The point slope is defined as the difference in the y coordinate between two points (y - y1) on a line is proportional to the difference in the x coordinate points (x - x1). This below worksheet help you to understand how to compute point slope form. The point slope form between any two points can be calculated by using the below formula
Point Slope Form (y - y1) = m(x - x1)
Where
m = the point slope of the line
(x1, y1) = the coordinates of a known point on the line.
Example:
Coordinates (X1,Y1) = (1,2)
Slope (M) = 3
(y-y1) = m(x-x1)
(y-2) = 3(x-1)
Y = 3x-3+2
Y = 3x-1
3x-y-1=0
Hence the point slope is 3x - y - 1=0
When you try such calculations on your own, this point slope form calculator can be used to verify your results.