Stage 20 · Coordinates & First Functions

20.5.1 The Formula Form

20.5 Three Ways to Show a Function, Plus Domain and Range

Point 1 of 6

20.5.1 The Formula Form

Core idea

Write the matching rule as a one-line formula like y = 2x + 1, and plug in an x to compute its y.

Module goal. Describe the same function through a formula, a table, and a graph, and use intervals to write down the range of inputs and outputs
eastmath.com · 20.5 Three Ways to Show a Function, Plus Domain and Range · 20.5.1 The Formula Form