The data below represent the number of days absent, x, and the final grade, y, for a sample of college students at a large university. complete parts (a) through (e) below. no. of absences, x 0 1 2 3 4 5 6 7 8 9 final grade, y 88.5 85.7 82.8 80.3 77.4 73.1 63.6 68.1 65.2 62.4 (a) find the least-squares regression line treating the number of absences, x, as the explanatory variable and the final grade, y, as the response variable.

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

idk

step-by-step explanation:

answer: $13,622.84

step-by-step explanation: check the picture for info and stats : )