A heated piece of metal cools according to the function c(x) = (.5)x − 11, where x is measured in hours. A device is added that
1 answer:
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Answer:
Step-by-step explanation:
The slope of a line equals to the difference between points' y-coordinates divided by the difference between their x-coordinates.
That is, if and
are the point of a line,
Then the slope of the line is,
By the given diagram,
,
,
and
Thus, the slope of the given line
=
⇒ Fourth option is correct.
