At noon, the temperature in ebonsville, florida was 20⁢℉. by midnight, the temperature had fallen to 8℉. what was the change in temperature over the 12-hour period? not sure on how to do this?

The change in temperature is basically the "distance" between the two values. And the distance between two numbers is given by their difference.

In fact, if you subtract two identical number, you get something like

which makes sense in our metaphor, since it means that the distance between 13 and 13 is zero. On the other hand, if you pick something like

it makes sense again, since we're saying that 26 and 5 are 21 units apart.

So, the change in temperature is the difference between the temperature:

This means that the two values are 12 units apart, and the minus sign means that the temperature has decreased.

So, we can say that the change in temperature is a decrease of 12 degrees.

step-by-step explanation:

if you meant, "on the way from (3, 2) to (3, 14):

x does not change; y increases by 12.

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