book Maths Puzzle Numerical Ability

please help me solve this word problem.

Walt made an extra $10,000 last week from a part-time job. He invested part of the money at 6% and the rest at 9%. He made a total of $69

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book Other Question

Graph each compound inequality.
x is greater than or equal to -2y and
x - 3y < 6

3 - x < y + 2 or
x > y + 5

Graph the absolute value inequalities.
|x + 2y| is greater I'm a distance learner and hope some one can help me.

I do not understand this question:

Find the equation of the in the graph (0,3).

I appreciate the help.