Arithmetic Sequences

Is this is an arithmetic sequence?

4, 11, 18, 25…

• Yes

• No

What is the explicit formula for the sequence: 4, 11, 18, 25…

• a_n= -3 - 7n

• a_n= -3 + 7n

• a_n= 4 + 7n

• a_n= 4 - 7n

Does this represent an arithmetic sequence?

2, 6, 10, 15…

• Yes

• No

What is the explicit formula for this sequence:

100, 96, 92, 88…

• a_n = 100 + 4n

• a_n = 100 - 4n

• a_n = 104 - 4n

• a_n = 104 + 4n

Does this represent an arithmetic sequence?

40, 20, 10, 5…

• Yes

• No

If you graph an arithmetic sequence, it would be a __________ function.

• exponential

• quadratic

• linear

• constant

Which sequence is NOT an arithmetic sequence?

• -7, -13, -19, -25,...

• -10, -6, -2, 2,..

• 6, 8, 10, 12,...

• 3, 15, 75, 375,...

Which sequence is NOT an arithmetic sequence?

• 12, 18, 24, 30,...

• 10, 3, -4, -11,...

• 2, 4, 8, 16,...

• 16, 20, 24, 28,...

Find a20 in the arithmetic sequence: (Hint: Find explicit formula first -  $a_n=a_0\pm dn$   )
5, 12, 19, 26...

• 145

• 144

• 142

• 138

What is the 76th term of the following arithmetic sequence? (Find the explicit formula first:  $a_n=a_0\pm dn$  )

8, 14, 20, 26,...

• 76

• 452

• 458

• 476