exam Maths Puzzle Numerical Ability

could someone help PLEASE!!!

Graph y = �2x + 2.

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exam Other Question

From the base elevation 9300ft. a mountain peak in Colorado rises to a summit elevation of 14872ft. over a horizontal distance of 15839ft. Find the grade of the peak.
The grade of Find the function y = ax^2 + bx + c whose graph contains the points (1,2), (-2,-7), and (2,-3).