This question is asking how many numbers out of the four possible answers fulfill the rule that x must be less than or equal to -2. So try out each number and see whether or not this statement is true, that is: is the number in place of x less than or equal to -2, or not?
-2: -2 fulfills the statement, as it is equal to -2.
-2.45: Also fulfills the statement, since it is less than -2.
-8: Once again fulfills the statement, as it is less than -2.
-1.76: DOES NOT fulfill the statement, it is greater than -2.
The answer would be -1.76