Aspring has an original length l inches. when a weight of x pounds is suspended from the spring, its new length y is given by the formula y = l +
x
k
, where k is a constant, measured in pounds per inch.
solve the formula for x. show the steps in your work.
the value of k for a certain spring is 2.5. the length of the spring is found to be double its original length when a 10 pound weight is suspended from it. write the equation for the original length of the spring and solve it. show the steps in your work.

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

definitely a. the others have almost all data points on one side of the line.

step-by-step explanation: