- anonymous

An equation was used to predict the number of possible enrollments in an afterschool program for the first 6 months of the year. The actual enrollments are also listed.
Actual enrollment 55 80 95 100 115 90
Predicted enrollment 75 80 85 90 95 100
The sum of the residuals is ______.

- chestercat

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- anonymous

Help please Medal and Fan!

- anonymous

- anonymous

hey

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## More answers

- anonymous

Hi

- anonymous

do you know what a residual is?

- anonymous

Nope

- anonymous

a residual is like the margin of an error in like an estimate or so

- anonymous

ok

- anonymous

so all we have to do in this question is find the error in the estimates

- anonymous

and add all of them together

- anonymous

Ok

- anonymous

so for the first one we have 75 predicted enrollment and 50 enrollment

- anonymous

we have -25 residual so far

- anonymous

Alright

- anonymous

remember we have to add all of these numbers in the end

- anonymous

for the second one the numbers are the same so we have 0 residual

- anonymous

btw i made a mistake the first one is 20 residual

- anonymous

Ok so the first one is 20 and the seond 0?

- anonymous

the third one we have 85 predicted and 95 actual

- anonymous

yes to your question

- anonymous

Ok

- anonymous

so can you try and calculate this one?

- anonymous

95 act. 85 predicted

- anonymous

add those numbers up?

- anonymous

no

- anonymous

we have to subtract them

- anonymous

to find the residual

- anonymous

Oh ok subract all those numbers you gave me and then it will give me the answer?

- anonymous

we have 10 additonal residual for the third one

- anonymous

and no to your question

- anonymous

Ok

- anonymous

so we have 20,0,and 10 so far

- anonymous

we have to find the SUM of all the residuals

- anonymous

mhm

- anonymous

So adding

- anonymous

what about 100 act. and 90 predicted

- anonymous

yes to your question

- anonymous

we have 10 residual

- anonymous

so 20,0,10 and 10 so far

- anonymous

40

- anonymous

so far yes

- anonymous

Ok

- anonymous

the next one is also 10

- anonymous

so 20,0,10,10,and 10

- anonymous

Wow ok lol its 50 now

- anonymous

the last one's residual is also 10

- anonymous

so the equation we have now is 20+0+10+10+10+10=?

- anonymous

60!

- anonymous

NICE!

- anonymous

tell me if i was right ok?

- anonymous

wait lemme just tag someone and let them proofread this ok?

- anonymous

- anonymous

Ok

- anonymous

So the answer is 60

- anonymous

yes

- anonymous

- anonymous

Ok

- anonymous

Nope the asnwer was wrong Oh well

- anonymous

what was the answer?!

- anonymous

idk the test doesn't give it to me it just says its wrong

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