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Generate a Pattern from a Rule — Pattern + Odd/Even

Follow each rule to write the number pattern, then check what the numbers do and explain WHY in your own words.

Example
Start at 1. Rule: add 2.
1,   3,   5,   7,   9,   11
Are the numbers all odd, all even, or do they alternate?
all oddall eventhey alternate
Why? 2 is even. When you add 2 to an odd number you still get an odd number — so every term stays odd, like the starting number.
  1. 1.
    Start at 1. Rule: add 2.
    1,   ,   ,   ,   ,  
    Are the numbers all odd, all even, or do they alternate?
    all oddall eventhey alternate
    Why?
  2. 2.
    Start at 9. Rule: add 6.
    9,   ,   ,   ,   ,  
    Are the numbers all odd, all even, or do they alternate?
    all oddall eventhey alternate
    Why?
  3. 3.
    Start at 5. Rule: add 4.
    5,   ,   ,   ,   ,  
    Are the numbers all odd, all even, or do they alternate?
    all oddall eventhey alternate
    Why?
  4. 4.
    Start at 3. Rule: add 4.
    3,   ,   ,   ,   ,  
    Are the numbers all odd, all even, or do they alternate?
    all oddall eventhey alternate
    Why?
  5. 5.
    Start at 9. Rule: add 4.
    9,   ,   ,   ,   ,  
    Are the numbers all odd, all even, or do they alternate?
    all oddall eventhey alternate
    Why?