Answer
a. $-10,-6,-2,2,6$
b. $4$
c. see below
.
Work Step by Step
a.
$a_{1}=-10+4(1-1)=-10$
$a_{2}=-10+4(2-1)=-6$
$a_{3}=-10+4(3-1)=-2$
$a_{4}=-10+4(4-1)=2$
$a_{5}=-10+4(5-1)=6$
(b)
$-6-(-10)=(-2)-(-6)=2-(-2)=6-2=4$
The common difference is $4$.
(c) graphed using desmos.com