Answer:
4
Step-by-step explanation:
A is at point (1, -3). C is at point (5, -3).
Since the <em>y</em> coordinates are the same, the distance between A and C depends on the <em>x</em> coordinates.
The difference between the <em>x</em> coordinates is 5-1 = 4.
A
As outdoor temperatures increased, residents' electric bills increased.
