Which is a valid function for displaying the highest value in a range of values?

A valid function for displaying the highest value in a range of values is the MAX function. In Excel, for example, you would use it as =MAX(A1:A10) to find the highest value in the range from A1 to A10. Similarly, in programming languages like Python, you can use the built-in max() function, such as max(values), where values is a list of numbers.