Question

Use the table to answer the question.

This table shows x-values with corresponding variables for y-values.
x y
2 a
4 b
Use the arithmetic sequence formula an=−8+(n−1)⋅2
to find the missing values in the table.

(1 point)
Responses

a=−6
; b=−2

a equals negative 6 ; b equals negative 2

a=−10
; b=−8

a equals negative 10 ; b equals negative 8

a=−15
; b=−13

a equals negative 15 ; b equals negative 13

a=−12
; b=−10

a equals negative 12 ; b equals negative 10
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Answer 1

Use n = x.

a = a2 = −8 + (2−1)·2 = −8 + 2 = −6
b = a4 = −8 + (4−1)·2 = −8 + 6 = −2

So a = −6, b = −2.