Question

Ivy and Andrey were asked to find an explicit formula for the sequence 19, 0, −19, −38, …. Ivy said the formula is an=19−19n. Andrey said the formula is an=−19+19n. Who is correct?(1 point)
Responses

both Ivy and Andrey
both Ivy and Andrey

neither Ivy nor Andrey
neither Ivy nor Andrey

only Ivy
only Ivy

only Andrey

Answer 1

only Ivy

The correct formula is an = 19 - 19n.