Arithmetic or Geometric?
find d or r
Durkin's
Writing Equations (Geometric)
Writing Equations (Arithmetic)
100

-4, 2, -1, 1/2

This is a Geometric sequence 

Common ratio: -1/2

100

The Common Difference of -20, -23, -26, -29...

What is -3?

100

What does Mr. Durkin's wife do?

School Nurse in the elementary

100

Write an equation for the nth term of the geometric sequences.

3, 15, 75, 375, 1875, ... 

an = 3*5n-1

100

Write an equation for the nth term of the arithmetic sequences. 

1, 4, 7, 10, 13, ...

an = 1 + (n - 1)3

200

2 1/2 , 3, 3 1/2, 4, 4 1/2...

What is Arithmetic?

200

The Common Ratio of the Sequence 2, 4, 8, 16, 32...

What is 2 ?

200

How many kids does Mr. Durkin have?

3 - 2 girls and a boy

200

Write an equation for the nth term of the geometric sequences. 

324, 108, 36, 12, 4, ...

an) = 324 * (1/3

200

Write an equation for the nth term of the arithmetic sequences. 

3, 8, 13, 18, 23, ...

an = 3 + (n - 1)5

300

2, 4, 6, 8...

What is Arithmetic?

300

The Common Difference of 18, 22, 26, 30...

What is 4?

300

What school did Mr. Durkin graduate from?

Jeffersonville Youngsville CSD

300

Write an equation for the nth term of the geometric sequences. 

1, -2, 4, -8, 16, ....

an=1 * (-2)n-1

300

Write an equation for the nth term of the arithmetic sequences. 

-8, -2, 4, 10, 16, ...

an = -8 + (n - 1)6

400
-2, -4, -8, -16...
What is Geometric?
400

The Common Ratio of the Sequence 3, 9, 27, 81...

What is 3?

400

What school did Mr. Durkin in during the Winter of 2023-2024?

Roscoe

400

Write an equation for the nth term of the geometric sequences. Then find the 8th term

3, 6, 12, 24, ...

an= 3*(2)n-1

a8= 384

400

Write an equation for the nth term of the arithmetic sequences. Then find the 7th term.

-6, 1, 8, 15, 22, ...

an = -6 + (n - 1)7

a7 = 36

500

The sequence -5, -10, -15, -20

What is what is arithmetic?

500

The Common Ratio of the Sequence 1000, 200, 40, 8...

What is 1/5 or 0.2?

500

Mr. Durkin has coached 4 sports while he was teaching here.  Name all four sports.

Football, Baseball, Soccer and Softball.

500

Write an equation for the nth term of the geometric sequences. Then find the 10th term

128, 64, 32, 16, 8, ...

an= 128(1/2)n-1

a10= 0.25

500

Write an equation for the nth term of the arithmetic sequences. Find the 10th term

11, 4, -3, -10, -17, -24, ...

an = 11 + (n - 1)(-7)

a10 = -52

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