Skip to main content
SWStudyWalks Search

College Algebra / Unit 5   Alg 239 short lesson, about 20 seconds

Evaluating versus Solving

Captions available

The idea

Evaluating a function answers "what output does this input give"; solving f(x) = k answers "what inputs give this output" — the two questions run in opposite directions.

In practice

For f(x) = 2x + 3: evaluating at 5 gives 13; solving f(x) = 13 recovers x = 5.

Your place on the trail

Every lesson rests on earlier ones and opens later ones. Tap any to jump.

Builds on

  • Nothing. This is a starting point.

Unlocks

  • Nothing yet depends on this.

Something wrong in this lesson? Flag it  ·  Sources for College Algebra