Chapter 13 - A Preview of Calculus: The Limit, Derivative, and Integral of a Function - Section 13.3 One-sided Limits; Continuous Functions - 13.3 Assess Your Understanding - Page 909: 12

True.

It is true that polynomial functions are continuous for all real numbers. For instance, a 2nd degree polynomial function has the form $ax^2+bx+c$. We can see that it has no holes, jumps or asymptotes (there is no division by zero, etc). Thus, the function is continuous for all real numbers.