exam Maths Puzzle Numerical Ability

graph the following equation and give the points

y=-4x

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exam Other Question

A line passing through (�6, �5) and (�1, y) is perpendicular to a line with slope -5/13 . Find the value of y My problem is; Find the slope and y - intercept. x = -7. Where do I even begin?
Please Help.
Thank you.