# In Which of the Following Table, X and Y Vary Directly: - Mathematics

Sum

In which of the following table, x and y vary directly:

 x 27 45 54 75 y 81 180 216 225

#### Solution

"x"_1/"x"_2=27/81=1/3

"x"_2/"y"_2=45/150=15/50=3/10

"x"_3/"y"_3=54/216=18/72=1/4

"x"_4/"y"_4=75/225=25/45=5/9

⇒"x"_1/"y"_1≠"x"_2/"y"_2 ≠"x"_3/"y"_3≠"x"_4/"y"_4

x and y are not in direct variation.

Concept: Types of Variation
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#### APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 10 Direct and Inverse Variations
Exercise 10 (A) | Q 1.3 | Page 120