The length of a spring varies directly with the mass of an object that is attached to it. When a 30-gram object is attached the
spring stretches 9 centimeters. Which equation relates the mass of the object, m, and the length of the spring, s?
m
10
10
S.
m
3
0 m
ma
30

We have been given that the length (s) of a spring varies directly with me mass (m) of an object. We are asked to find the equation that represents the relation, when a 30-gram object is attached the  spring stretches 9 centimeters.

We know that two directly proportional quantities are in form , where y is directly proportional to x and k is constant of proportionality.

Let us find constant of proportionality for our relation.

Therefore, our required equation would be .

step-by-step explanation:

mean or average is 40.6