book Maths Puzzle Numerical Ability

|12y/-3y2 power| Please show how to figure this out

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49/56 =r/32 Is the answer 28???? Given the Points (-3,-3),(5,4),and(7,5)
1. Graph the points
2. Draw a line parallel to the given line and write its equation
3. Draw a line perpendicular to the given line that