You are making a knotted necklace. The table below shows the amount of string you need for different necklace lengths.

Question

Here's the table:
Length of Necklace (inches)
10
11
12
13

Across from that to the right is:
Amount of string (inches)
200
202
204
206

I need help on to write and graph a function rule that represents the situation.

Here's my try at it. L = 200 + 2 x S

Answer 1

string = 200 + 2 (length of necklace - 10)

or

string = 180 + 2 length of necklace)

Answer 2

I don't think that'd work :T

Answer 3

Meaning I think I need a better function rule.

Answer 4

string = 180 + 2 (necklace)
if necklace = 10
string = 180 + 20 = 200

if necklace = 11
string = 180 + 22 = 202

if necklace = 12
string = 180 + 24 = 204 etc works fine

Answer 5

Okay and thank you, Have a great holiday and New Years!

Answer 6

You are welcome :)