Posted by **w** on Sunday, June 16, 2013 at 1:14pm.

The length of a spring is a linear function of the mass of the object hanging from it. For a particular spring, the length was 12 centimeters when a 2-kg mass was attached to it. When a 5-kg mass was hung from it, it stretched to a length of 18 cm. Which equation relates the length of this spring, y, to the number of kilograms hung from it, x?

- algebra -
**Steve**, Sunday, June 16, 2013 at 3:10pm
if the length y is a function of the mass, x, then

y = ax+b

2a+b = 12

5a+b = 18

subtract 1st from 2nd to get

3a = 6

a = 2

2*2+b=12, so b=8

y = 2x+8

## Answer this Question

## Related Questions

- science - A light spring is initially used to suspend masses from the ceiling. ...
- physics - a spring with a length of 22.0 centimeters hangs from a ceiling. when ...
- Physics - The length of a spring increases by 7.2 cm from its relaxed length ...
- Physics please HELP - An insulating sphere of mass m and positive charge q is ...
- Physics Important please - An insulating sphere of mass m and positive charge q ...
- Physics - An insulating sphere of mass m and positive charge q is attached to a ...
- Physics - A spring of unknown force constant is attached to a rod so that it ...
- Physics - VERTICAL SPRING A spring of negligible mass, spring constant k = 89 N/...
- Physics Urgent please help - A spring of negligible mass, spring constant k = 82...
- Physics - Placing a 215 g mass on a vertical spring causes a stretch of 5.1 cm. ...