Eight students, randomly selected from a large class, were asked to keep a record of the hours they spent studying before the midterm examination. the following table gives the number of hours these eight students studied before the midterm and their scores on the midterm. hours studied 15 7 12 8 18 6 9 11 midterm score 97 78 87 92 89 57 74 69 a) do the midterms scores depend on hours studied or do hours studied depend on the midterm scores? do you expect a positive or a negative relationship between these two variables? b) taking hours studied as an independent variable and midterm scores as a dependent variable compute s xx , s yy and s xy . c) find the least squares regression line. d) interpret the meaning of the values of a and b calculated in part (c). e) plot the scatter diagram and the regression line. f) calculate r . g) calculate also the coefficient of determination.

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950