book Maths Puzzle Numerical Ability

The first part of this question is y=1/x-2.
The answer has to give the y values for x,
Then use these points and draw a curve, must show graph.

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book Other Question

Find the equation of the line which is perpendicular to the line and passing through the point (4, -2). Sketch the line and the perpendicular line in the same set of axes.
directions: identify the vertex and intercepts without using a calculator.

i am not sure what i was suppose to do but i did the chart with the first column being X the midd