Direct Variation

                    Lesson 1

 

                                           Problem:    If a varies directly as b and a is 4 when j is 8, find the constant of variation.

                                          

                                           Solution     If a varies directly as b, a/b = u

                                           Step 1:        

                           

                                           Solution     4/8 = u  =>    1/2 = u

                                           Step 2:          

                            

                                           Solution     Answer : 1/2

                                           Step 3:                                           

                   Complete

                                           Try two practice problems:

                                                                       

                                                                Do the following:

                                             

A.

In the following chart, does one variable vary directly with the other?

 

 S  3  4   7     8    9

 D  3  4   7    16   18

B.

If x varies directly as C and X is 1 when C is 2, find the constant of variation.

 

 

 

 

 

 

 

 

 

 

 

 

 

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