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? A s= 3/ 10m
B s= 10/3m
C m=3/10s
D m=1/30s​

Step-by-step explanation:

I'm assuming that the length of the spring is s and the mass of the object is m. If that be the case, the direct variation equation, which a line btw, is

s = km where k is the constant of proportionality. We have to solve for k, the slope of the line, in order to determine the model for this situation.

9 = k(30) so

Now that we know, the slope of the line, we can rewrite the equation with the slope in place:

, choice A.

We first calculate the range using the minimum and maximum data points of the set. the lowest value is 1, while the highest is 29. therefore, the range of the set is 29 - 1 = 28. if we have 6 intervals, then each interval should have a length of 28/6 = 4.667, but if these are only for integer data points, then each interval will have a length of 5 (the later intervals may have shorter lengths of 4).