exam Maths Puzzle Numerical Ability

What is the slope of the line passing through the points (1,0) and (2,9)?

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exam Other Question

Find all solutions for x^2+x+6=0 with the answer in a+bi form.
Where b<0 and b>0 I have the following problem; Write the equation of the line which passes through the point (2,1) and is parallel to the equation y = 5/2x + 6. My answer is y= 5/2x - 1 is this correct? Please help.