Tutorial - Solve for the missing variable when you have two direct variations ex 2

The video tutorial explains how Y varies directly with X, meaning their constants are equal. It demonstrates setting up equations for direct variation and solving them using proportions and cross products. The tutorial concludes by solving for X, providing a clear example of the process.

What does it mean when Y varies directly with X?

• Y and X are unrelated

• Y is always greater than X

• Y is inversely proportional to X

• Y and X have a constant ratio

In a direct variation, if Y = 10 when X = 2, what is the constant of variation?

• 5

• 2

• 10

• 20

What is the first step in solving for X in a direct variation problem?

• Set up a proportion

• Multiply Y by X

• Add Y and X

• Subtract X from Y

Which method is used to solve the proportion in a direct variation problem?

• Substitution

• Cross product

• Addition

• Division

If 5X = 3, what is the value of X?

• 1/5

• 3/5

• 15

• 5/3