Use the given type of variation and the values for the independent variable x and the dependent variable y to find the value of k, the constant of variation.

Direct 3 90 30
Inverse 3 90 ?
Direct 4 20 ?
Inverse 4 20 ?
Direct 5 50 ?

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?