Concepts and some theory
Is the constant of proportionality in a variation problem.
What is k ?
The number of selling products and the profit
What is an example of direct variation?
A 6-month-old Labrador puppy gets 4.5 cups of food per day. This is the amount of cups she eats in 2 weeks
What is 63 cups?
The equation
y=kx
What is direct variation?
The bank balance and the expenditures.
What is an example of inverse variation?
A student lives 120 miles from the college she attends. This is her driving time when she averages 72 miles per hour, manages to not get pulled over by a patrol and the constant of proportionality is the distance she travels.
What is 1.667 hours? (About 1.7 hours)
The equation
y=k/x
What is inverse variation?
The amount of limes in a bag and the price you pay for them.
What is an example of direct variation?
The time to complete a project is inversely proportional to the number of people who are working on the problem. A class project can be completed by 3 students in 20 days. This is the amount of students you need to add in order to finish the project in 5 days?
What is 9 more students?
The 4 steps you have to follow to solve a variation problem.
What are "set the variables", "identify the constant of proportionality", "set the variation" and "solve the problem"?
The battery power and the time which it is used.
What is an example of inverse variation?
In construction, the strength of a support beam varies inversely with the cube of its length. If a 12-foot beam can support 1,800 pounds, how many pounds can a 15-foot bean support?
What is 1,440 pounds?
The number of mistakes in a math test and the practice.
What is an example of inverse variation?