2
QuizMultiple Choice

Functions and Their Properties

Question 2 • TX-Pre-Calculus

Which function is continuous?

Answer
A
Number of children enrolled in a particular school as a function of time.
B
Outdoor temperature as a function of time.
C
Price of a stock as function of time.
D
Cost of U.S. postage as a function of the weight of the letter.

Explanation

Outdoor temperature generally changes gradually over time, so its value can be modeled as a continuous function. The number of children is counted in whole numbers, stock prices can jump, and postage costs change in steps at weight limits, so those functions are not continuous.

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