Question

Write a function f(b) that determines the number of

triangles in any given level of the pyramid.

Answer 1

f(l) = l/3

Explanation:

A clue to the functional relation is often found in the differences between values in the table.

Here the differences between "level" values are all 3. The differences between "triangles" values are all 1. The constant differences suggest the relation is linear. We note that all "triangles" values are 1/3 the "level" values.

f(l) = (1/3)l