Interval notation is a way to represent a range of numbers using brackets and parentheses. It is commonly used in mathematics and science to express inequalities and intervals on a number line.
This notation indicates that the function f(x) has a value that is greater than 36. In other words, any value of x that is plugged into the function will result in a number greater than 36.
The inequality symbol < represents "less than". In the given interval notation, it indicates that the value of x must be less than 21.
Yes, interval notation can be graphed on a number line. In this case, the interval would be shown as a shaded region to the left of the number 21, since x must be less than 21 for the inequality to be true.
Interval notation is read as "x is less than 21" or "the interval of x is less than 21". In this case, the full notation would be read as "f(x) is greater than 36 for x that is less than 21".