PLZ SOMEONE HELP ME THIS IS URGENT AND MY MATH TEACHER IS REALLY STRICT PLZ HELP???

Use this data in the problem below. follow the steps carefully. round to the nearest tenth. lot 3: week 1: 345 week 2: 340 week 3: 400 week 4: 325 step 1. jim enters the data and calculates the average or mean. step 2. jim calculates the deviation from the mean by subtracting the mean from each value. step 3. jim squares each deviation to remove negative signs. step 4. jim sums the squares of each deviation and divides by the count for the variance. step 5. jim takes the square root of the variance to find the standard deviation.

Multiplying an even number of negative numbers gives an answer that is choose from:

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.