Find the formula for the nth term of the arithmetic sequence - 7, - 4, - 1, 2

-7 + 3 (n - 1)

Step-by-step explanation:

(-4) - (-7) = - 4 + 7 = 3

(-1) - (-4) = 3

2 - (-1) = 3

then the common difference r = 3

and the first term is - 7

since the nth term = first term + (n - 1) * r

then the nth term = - 7 + (n - 1) * 3

= - 7 + 3 (n - 1)