2. You are driving along a highway at constant speed of 55 MPH. You observe a car one- half mile behind you. The car is moving fast and zooms by you exactly one minute later.
How fast is the car traveling

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)