Help me please help please

  D.  7°C

Step-by-step explanation:

The difference between two numbers is the distance between them on the number line.

  4 -(-3) = 4 +3 = 7

Temperatures -3°C and +4°C are 7°C apart. The difference between the temperatures is 7°C.

_____

Additional comment

Often, in math, when we talk about the difference between A and B, we mean specifically the value (A-B). In plain English, when we talk about the difference between A and B, we mean the positive difference--the value obtained by subtracting the smaller number from the larger one.

Here, the difference between New York and London temperatures would ordinarily be interpreted in math to be -3 -4 = -7°C. That is not an answer choice, so we must assume the positive difference, 7°C, is intended.

See the image that has been attached.

Step-by-step explanation:

On a coordinate plane, the x value is always first in a coordinate pair. The y value is second.

This means that -3 is the x value. X values go left and right, so -3 is three left from 0,0.

The same goes for the y value. Since the y value is 4, the y value is 4 is 4 up from 0,0.