Question

Is the sequence arithmetic? If so, how do you know? Given the sequence: 20, 26, 32, 38, . . .

Answer 1

yes

Explanation:

it is

because difference between each two consecutive terms are equal

26-20=32-26=38-32

for the formula:

20 is the first term.

6 is the difference between each two consecutive terms

so:

`y = 6(x - 1) + 20 \\ y = 6x + 14`