exam Maths Puzzle Numerical Ability

is the points A(2,1),B(-4,1),C(-1,-3) Collinear or noncollinear

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exam Other Question

(Heating water) The temperature of water in a heating tea kettle rises according to the equation y=30x +72, where y is the temperature (in degrees Fahrenheit) x minutes after the k find the slope of the line containing the pair of points (9,0) and (10,6). Simplify your answer, type an integer or a fraction.