Will a set of data always have a mode? explain your answer.

No

Step-by-step explanation: Unlike the mean and median of a data set, it's completely possible for a data set to have no mode. Remember, the mode is the number that appears most frequently in a data set.

I'll show you an example of a data set that has no mode.

In the image provided, you will see that each of the numbers appear only once. In this situation, we would just write no mode.

your answer is the last one

step-by-step explanation:

divide the length of a'c' by the length of ac to get a scale factor of two

& then reflect vertically (over the y-axis)

so your answer is dilation by a scale factor of 2 followed by reflection over the y-axis