3r + 3s = 3(r + s) answer
Maybe B I think I’m not one hundred percent sure
Answer:
d. 0.80
Step-by-step explanation:
The given regression equation is
y=0.6x+188
Here, slope=b=0.6
xbar=420, sx=80, ybar=440 and sy=60.
As we know that when y=a+bx, the slope is
b=r(sy/sx)
From this equation we can find correlation coefficient r
b*sx=r*sy
bsx/sy=r
r=0.6*80/60=48/60=0.80.
Hence the correlation coefficient r=0.8.
We have to calculate how much time they spend in a day.
Jake:
3/4 hour-----------------------2 days
x---------------------------------1 day
x=(3/4 hour*1day) / 2 days=3/8 hours
Kyile:
1/4 hour------------------------6 days.
x----------------------------------1 day
x=(1/4 hour * 1 days) / 6 days=1/24 hours
3/8 hours>1/24 hours, therefore
Jake sepent more time total working on his project.
