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Let y varies directly as x,if y=12 when x=4,then write a linear equation. What is the value of y,when x=5

Posted by Anuja Anil 8 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Naveen Sharma 8 years, 9 months ago

Ans. When y Varies directly as x, the eqaution will be in form of

y = kx, where k is constant of proportionality.

Putting y = 12 and x = 4, we get

=> 12 = 4k

=> k = 3

So, y = 3x

Linear Equation : y - 3x = 0

When x = 5

y - 3*5 = 0

=> y = 15

1Thank You

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CBSE > Class 09 > Mathematics