Dora started measuring change in temperatures each hour in the evening as the temperature dropped heading into the night. The temperatures changes Dora recorded were: 15 degrees, 12 degrees, 12 degrees, 19 degrees, and 16 degrees. Express the total change in temperature as an integer.

ANSWER

Infinitely many solutions

EXPLANATION

The given system of equations is:





The graph of the two equations are shown in the attachment.

The solution to the system of equations represented by the two straight lines is the point of intersection of the two straight lines.

We can see from the graph that both lines coincide with each other.

One line is lying exactly on the other.

Their point of intersections cannot be counted.

The system is consistent and dependent, hence the system has infinitely many solutions.