Question

student of class 9, while experimenting with the stretching length of the spring arrived at a

linear equation y = 4x + 3 where ‘x’ denotes weight attached to the spring and y denotes length of

the spring. When x is increased by 2, how much does y increase?​

Answer 1

SOLUTION

GIVEN

Student of class 9, while experimenting with the stretching length of the spring arrived at a linear equation y = 4x + 3 where ‘x’ denotes weight attached to the spring and y denotes length of the spring.

TO DETERMINE

When x is increased by 2, the number by which y increase

EVALUATION

Here it is given that student of class 9, while experimenting with the stretching length of the spring arrived at a linear equation y = 4x + 3 where ‘x’ denotes weight attached to the spring and y denotes length of the spring.

So the given linear equation is

$\sf{y = 4x + 3}$

Now x is increased by 2

When x = 2 we have

y = ( 4 × 2 ) + 3 = 8 + 3 = 11

So y increased by 11

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