Arithmetic Sequences

Identify the common difference. 
10, 20, 30, 40, ...

• 5
• 10
• 15
• 20

Is the sequence arithmetic?

17, 9, 1, -7, ...

• Yes

• No

Given the sequence:

25, 21, 17, 13,...

Write the equation that models the sequence.

• a_n = 4n + 29

• a_n = -4n + 25

• a_n = -4n + 29

• a_n = 4n + 25

Identify the common difference.
97, 86, 75, 64, ...

• 8
• 11
• -11
• -8

Find the next three terms in the arithmetic sequence:

-33, -24, -15, -6, ...

• -1, 7, 15

• -5, 2, 9

• 3, 12, 21

• -65, -73, -81

Is the sequence arithmetic?

78, 785, 7855, 78555, ...

• Yes

• No

Find a₂₀ in the arithmetic sequence:

5, 12, 19, 26...

• 145

• 144

• 142

• 138

The first three terms of an arithmetic sequence are as follows

13, 19, 25

What are the next two terms of the sequence?

• 31 and 37

• 31 and 36

• 30 and 37

• 30 and 36

Which sequence is NOT an arithmetic sequence?

• 12, 18, 24, 30,...

• 10, 3, -4, -11,...

• 2, 4, 8, 16,...

• 16, 20, 24, 28,...

What is the common difference of the sequence 2, -1, -4, -7,...?

• -3

• -1

• -2

• 3