Four students in ms. alton's class shared the correlation coefficients derived from their data as follows: student a: r = –0.87 student b: r = –0.78 student c: r = 0.79 student d: r = 0.86 whose data had the strongest correlation?

answer: student a: r = –0.87

step-by-step explanation:

we know that the closer the value is to 1 or –1, the stronger the linear correlation.

from all the options, student a with correlation coefficient r = –0.87 is nearest to -1 ,had the strongest negative correlation.

correlation tells that the strength of a relationship between two variables .

a strong, or high, correlation means that two or more variables have a strong relationship with each other.

a weak or low correlation means that the variables are hardly related.

$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)

14

step-by-step explanation:

14