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what is the equation for undefined slope. Slope is rise over run or y2 - y1 x2 - x1 in slope-intercept form of y mx b the slope is m and the y-intercept point is 0b if slope is positive then the line rises upward from left to right. Hence we call it undefined.
M y 1 y 2 x 1 x 2 m 4 1 -3 -3 m 30. A slope can also be found to be undefined with the other formula for finding the gradient m of a straight line m tan th. That is - 2.
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So the equation of the line is x a x a. Undefined slope if a line y mx b y m x b is vertical. If you look more closely at the graph youll see. In this case the line passes through -2 -6 and therefore the constant is the value of the x-coordinate.