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GeoGebraGeoGebra Classroom


We start by noting that the slope of a line passing through any two points and can be found as . If we multiply this equation on both sides by , and switch the sides, we get . But let's allow to be any point . This gives us the point-slope formula . We can then change this to the slope-intercept form by solving for : . Note that the quantity in the parentheses is "", the -intercept