book Maths Puzzle Numerical Ability

Please Help. I am trying to graph the following problems.

y>1/3x-5
y<1/2x+2
x-3y<9

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book Other Question

Dividing by n is the smae as multipling by,... The value for imports for a small Central American country is believed to be growing according to the function

I=15 log(16t+33)

and the value of exports appears to be growing