30 mass (m/kg) for every 2 extension (e/mm)

8 mass (m/kg) for every 120 mass (m/kg)

2 mass (m/kg) for every 30 extension (e/mm)

120 mass (m/kg) for every 8 extension (e/mm)

6

$\frac{4}{5}$

$-\frac{4}{5}x$

$-\frac{4}{5}$

4

x

6

-6

3

4

-3

-4

3/5

1

-3/5

-1

5

2

-5

-2