Suppose four friends each pay for a pair of socks and one 30- minute jump. The jump costs $10.50 per person. If they spend a
total of $50, then the equation 4 (10.50 + x) = 50 can be used
to find the cost x of the socks.
Write About It!
What is the cost to rent a pair of socks?
Write a mathematical argument that can be used to defend
your solution.

both equations and proportions are better.

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,

a

step-by-step explanation: