Graphs are visual representations of functions. If you know how to read graphs, you can say a lot about a function just by looking at its graph. Learn this fine art of mathematical divining.

In the above graph, if \( f(0) = 7 \), what is the value of \( f( 4) \)?

The above graph consists of 2 straight lines. If \( f(1 ) = 5 \), what is the value of \( f( 9 ) \)?

In the above graph, if \( f(0) = 3 \), what is the value of \( f(9) \)?

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