PSSA OTD

What is implied when it is said that x and y have a positive correlation? 

A. When the value of x decreases, the value of y does not necessarily increase or decrease. 

B. When the value of x increases, the value of y does not necessarily increase or decrease. 

C. When the value of x increases, the value of y decreases.

D. When the value of x increases, the value of y increases.

Patterns

Also known as sequences

Continue a numeric or algebraic pattern (pattern must show 3 repetitions – may include up to 2 operations, squares and square roots).

Arithmetic Sequences

• Arithmetic Sequence

• Common difference

Arithmetic Sequences

1) 2,4,6,8,…

2) 3,7,11,15

3) -36,-47,-58,-69,…

4) 99,94,89,84,….

Two Operations

1) 35,40,38,43,….

2) 94,92,102,100,110,…

3) 57,31,46,20,35,…

Finding the nth term

MONEY The arithmetic sequence 1, 10, 19, 28, … represents the total number of dollars Erin has in her account after her weekly allowance is added.

A. What is the first term? a1 =

B. What is the difference? d =

C. What is the 52nd term?