Write two algebraic pattern rules for this toothpick pattern.

Question

Figure 1 = 3toothpicks
Fiqure 2 = 5 toothpicks
Figure 3 = 7 toothpicks
Figure 4 = 9 toothpicks

i need help please.
I did 1-3n for Figure 1

Answer 1

The number of toothpicks increase by 2 each time --> n + 2?

Answer 2

I got 2n-1 but i can't find another algebraic pattern rule

Answer 3

let n= figure number

2n+1

Answer 4

There is a second one doe