Question

the variables y and x have a proportional relatinship and y=9 when x=2 what is the value of y when x=30

Answer 1

The value of y for proportional relationship when x = 30 is y = 135.

What is proportional relationship?

Relationships among two variables that are proportional occur when their ratios are equal. Another way to consider them is that in a proportionate relation, one variable is consistently equal to the other's constant value.

A "constant of proportionality" is the name of this constant.

the importance of proportional relationship are-

• Students' grasp of numerous areas in science and maths depends on their ability to use ratios and proportions.
• They play a crucial role in the development of slopes, uniform rate of change and other concepts and abilities that are essential to understanding and mastering algebra.

Calculation the for the value of y.

According to the question,

The variables y and x have a proportional relationship.

Where, y=9 when x=2

Thus,

y/x = 9/2

Cross multiplying the above result;

2y = 9x

The value of y when x = 30.

2y = 9×30

2y = 270

 y = 135

Therefore, the value of y when x=30 is 135.

To know more about the proportional relationship, here

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