On a timer The graph below shows a scatter plot and the line of best fit relating the ages of children and the total number of t
imes they have visited the doctor.
Use the line of best fit to estimate the age of a child who has visited the doctor 40 times.
A.
12 years old
B.
11 years old
C.
14 years old
D.
13 years old
Use the line of best fit to estimate the age of a child who has visited the doctor 40 times.
A.
12 years old
B.
11 years old
C.
14 years old
D.
13 years old
1 answer:
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ANSWER
EXPLANATION
The given binomial expansion is:
Compare this to
we have a=2x , b=-3y and n=10
We want to find the coefficient of the term
This implies that, r=5.
The terms in the expansion can be obtained using
We substitute the given values to obtain;
Hence the coefficient is;