-1.25 is a negative number since it has a 'subtract' sign thing in front of the actual number.
When the number is negative, it moves to the left however large the number away from zero is.
Based on the question on what point is located at -1.25, it means we must move 1.25 to the left of the position of zero.
By doing that we get that (A) is at -1.25.
Hope that helps!