Find the First Term and the Common Difference for the Arithmetic

Multiple Choice

Find the first term and the common difference for the arithmetic sequence. Round approximations to the nearest
hundredth.
- $$a _ { 5 } = 15 , a _ { 21 } = 95$$

A) $a _ { 1 } = 80 , d = 5$
B) $\mathrm { a } _ { 1 } = 80 , \mathrm {~d} = - 5$
C) $a _ { 1 } = - 5 , d = 5$
D) $a _ { 1 } = - 5 , d = 80$