Arnold K H Tan's answer to .....'s Secondary 3 A Maths Singapore question.
why is the gradient zero?
If the straight line is parallel to the x-axis (first equation), the gradient of the straight line = 0. Since the question stated the line is not parallel to the x-axis, hence p² cannot be equal to 0, (if not, this means the gradient = 0).
oh i see!!! thank you so much for your explanation!!
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