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10 questions from this quiz
AB=(x2−x1)2+(y2−y1)2AB = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}AB=(x2−x1)2+(y2−y1)2
How steep a line is and rate of change
(5;5)(5; 5)(5;5)
Gradient-point form: y−y1=m(x−x1)y - y_1 = m(x - x_1)y−y1=m(x−x1)
y=ky = ky=k (where k is a constant)
Undefined
m=tanθm = \tan \thetam=tanθ for 0°≤θ<180°0° \leq \theta < 180°0°≤θ<180°
Obtuse angle (90° < θ\thetaθ < 180°)
m1=m2m_1 = m_2m1=m2 (identical gradients)
m1×m2=−1m_1 \times m_2 = -1m1×m2=−1
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