Use the constant controller to examine the effect of h in the point-slope form of a linear equation.
Investigate h in the equation y – k = m(x – h).
What happens to the point on the line as h is increased in value?
What happens to the graph as h is increased?
How can you shift the line so that it moves toward left?
What would an equation of a line which passes through the point (-3, 1) be?