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=−15
; b=−13

a equals negative 15 ; b equals negative 13

a=−12
; b=−10

a equals negative 12 ; b equals negative 10

a=−10
; b=−8

a equals negative 10 ; b equals negative 8

Answer 1

Use n = x. Compute a_n = -8 + (n−1)·2 = 2n − 10.
For n=2: a = 2(2) − 10 = −6.
For n=4: b = 2(4) − 10 = −2.

So a = −6, b = −2.