Answer
a. $7,10,13,16,19$
b. $3$
c. see below
.
Work Step by Step
a.
$a_{1}=7+3(1-1)=7$,
$a_{2}=7+3(2-1)=7+3=10$,
$a_{3}=7+3(3-1)=13$,
$a_{4}=7+3(4-1)=16$,
$a_{5}=7+3(5-1)=19$
(b)
$10-7=13-10=16-13=19-16=3$
The common difference is $3$.
(c) graphed using desmos.com
