Texas Math Models

Try “number line” or “4.5D”

Position to value

input and output

G4

A tile pattern grows. The rule: multiply the position by 4, then add 1.Tiles in Each FigurePositionTiles1529313417the left column is WHICH figure, not how manythe rule, written as an expression(1 × 4) + 1 = 5  ✓(4 × 4) + 1 = 17  ✓so figure 6, without drawing it:(6 × 4) + 1 = 25the left column is a position, and a rule reaches any position you ask for

How this one works

How

the left column says WHICH one, so put that number into the rule.

Best when

you are asked about a figure too far along to draw.

seen one of these on a test? See it on a real question: TEKS 3.5E, finding the rule in a table.

The same problem, other ways