A teacher writes the results of a test on the board: 7 students received A's, 10 students received B's, 18 students received C's, 4 students received D's, and 1 student received an F. The grade of C would represent which measure of central tendency? a. Mean b. Mode c. Median d. Standard deviation

Step-by-step explanation:

Given that  "A teacher writes the results of a test on the board:

7 students received A's, 10 students received B's, 18 students received C's, 4 students received D's, and 1 student received an F."

The mode is the most occurring  value in a data set.

In the given case, the frequency distribution was 7 A's, 10 B's, 18 C's, 4 D's and 1 F, since C is the most common grade,therefore it is the mode.

Only if the given was a normal distribution, the mode must be equal to the mean and the median.

In this case the median(middle term) is also C .

Hence C is the mode because it is the value that occurs most  in the given set of data.

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1

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