For the following functions, think about "How to graph like a math teacher."
Math teachers want to sketch graphs quickly and efficiently and choose
values of x that work "nicely" in the equation and generate integer
values of y, thus making it easier to graph.
- Which points are best found by inspection?
- Which points are best found by substitution?
- Which points are best found by symmetry?
$y = \dfrac{1}{3}x + 7$
$y = \dfrac{2}{7}(x + 4)$
$y = \dfrac{x + 2}{5}$
What are your favorite examples of this?
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