Dave @ MathNotations posted this nice problem today, good for an Algebra 2 or Precalculus class. I like it:
Consider the following problem:
If -5 ≤ x ≤ 4, and f(x) = 2x2 – 3, how many integer values are possible for f(x)?
For the solution, and some added pedagogical discussion, visit the original post here. Thanks, Dave!