exam Maths Puzzle Numerical Ability

Find the slope of the line through the given points.
(2,1) (2, 7)

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exam Other Question

Given that a quadratic goes through the points (-1,0), (0.67,0), and (0,-2), find the quadratic that goes through the points and find the solutions. Please help:
A roof rises 8.5 ft over a horizontal distance of 18.02 ft. What is the slope of the roof to tje nearest hundredth?