MagicMath: Plotting Straight Lines

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Plotting Straight Lines

If you give two points or give one point and the slope, you can get the equation of the line and its plot.

Give any two points (X₁, Y₁) and (X₂, Y₂) to get a straigt line:
Give a point and a slope to get a straigt line:

MagicMath Challenge: Given the equation of a line and a point (a, b), how do you determine if the point is on the line or not?

Math Detective: Can you find lines that can not be entered in the slope-point form? If indeed there are such lines, how can they be plotted then?

algebra

	X	Y
point one:
point two:

	X	Y
point one:
slope: