Generate and plot ordered pairs from rules, tables, and contexts.
Generate coordinates from a rule
Problem
Evaluate \(y~=~x~+~3\) at \(x~=~0\), \(1\), and \(2\), then report the complete set of matching ordered pairs.
Big Picture
What this problem is really about
Treat each requested input as a separate substitution into the same rule. Keep the input as the first coordinate, compute only its matching output for the second coordinate, and repeat until every requested input appears exactly once. Writing each pair immediately after its calculation helps prevent reversing coordinates or carrying one output into the next pair.
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