2.3 Direct Variation. A linear function in the form of y=kx where k is the constant of variation.

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Presentation transcript:

2.3 Direct Variation

A linear function in the form of y=kx where k is the constant of variation

Using a table XY XY

Looking at an Equation

Solve For each direct variation, find the constant of variation. Then find the value of y when x = 6.

Using proportions Direct variation is represented by a proportion when you are not asked to solve for the constant of variation.

Examples If y = 9 when x = 12, find x when y = 15 If y = 7 when x = 16, find y when x = 4

Application If it costs me $46 to fill the tank of my SUV and I can travel 305 miles, how much would it cost me to travel 423 miles?

Application If I can travel 50 miles in 45 minutes, how long will it take me to travel 229miles? Convert your answer to hours and minutes.

Homework 9/6: #10 pg even 9/7: #11 pg , 38-41, /8: #12 pg even