For the Rule of 78, for a 12 month period, the last term in the sequence is 12 and the series sums to 78. For an 14 month period, the last term is
and the series sum is
.

For a 16 month period, the last term is
and the series sum is
.

For a 20 month period, the last term is
and the series sum is

answer: c. is your answer

step-by-step explanation: get me a black leather coat

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33