1. jill had the following scores on her math quizzes 20, 40, 40, 40, 60, 60, 60, 60, 80, 80, 80, 80, 100.
what is the mean score for jill’s quizzes? show your work.
a. what is the total of her quiz scores?
b. how many quizzes did she take?
c. what is the average jill scored on her quizzes?

a is 800

b is 13

c is 61.5

Step-by-step explanation:

for a you add all of the given data together

b you count how many data points there are

c you get the answer from the a  and divided by 13

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33