# What does it mean when Y is directly proportional to the square of x?

Table of Contents

- 1 What does it mean when Y is directly proportional to the square of x?
- 2 When x and y are directly proportional Which of the following is correct?
- 3 Can y be directly proportional to x2?
- 4 When x and y are in direct proportion then the relationship between X and Y?
- 5 What is the difference between directly and inversely proportional?
- 6 Why is y = x2 not a directly proportional relationship?
- 7 What does it mean for two variables to be directly proportional?

## What does it mean when Y is directly proportional to the square of x?

If y equals x squared, then y is a quadratic function of x. Technically it would also be if y = a x**2 + b, where **2 means squared and a and b are real numbers. Mathematically, “y is inversely proportional to the square of x” means that (for some constant value c).

## When x and y are directly proportional Which of the following is correct?

3. If x and y are directly proportional, then which of the following is correct? k=x/y, where k is a constant.

**How do you know if y is proportional to x 2?**

5 Answers. The definition of proportionality is that A∝B⟺A=kB. So A is linearly related to B, and also A=0 iff B=0. In your case, y=(1)x2 so y is actually proportional to x2.

**What is the equation when y is inversely proportional to x?**

General Formula of Inversely Proportional Let x and y be two quantities. Then, y being inversely proportional to x is the same thing as y being directly proportional to 1/x. It is written mathematically as y ∝ 1/x. The general equation for inverse variation is y = k/x, where k is the constant of proportionality.

### Can y be directly proportional to x2?

Given y is directly proportional to x2, means there is a constant k so that y = k * x2.

### When x and y are in direct proportion then the relationship between X and Y?

When two quantities x and yare in direct proportion (or vary directly), they are written as x ∝ y. Symbol “∝” stands for ‘is proportional to’. When two quantities x and y are in inverse proportion (or vary inversely) they are written as x ∝ 1 y .

**Which of the following is correct if X and Y are inversely proportional?**

The correct option to the given statement. where k is a constant. where k is a constant. ∴ xy equals to constant i.e, xy=k(constant).

**Is Y directly proportional to x?**

Yes, y is directly proportional to x.

#### What is the difference between directly and inversely proportional?

In a direct proportion, the ratio between matching quantities stays the same if they are divided. (They form equivalent fractions). In an indirect (or inverse) proportion, as one quantity increases, the other decreases.

#### Why is y = x2 not a directly proportional relationship?

The equation y = x2 does not represent a directly proportional relationship, because y is not some constant multiple of x. To the problem at hand — we are given that y and x are directly proportional. This means y is a constant multiple of x. This can be written as y = kx, where k is some constant multiple (a number).

**What is an example of constant of proportionality?**

Example: y is directly proportional to x, and when x=3 then y=15. What is the constant of proportionality? They are directly proportional, so: Put in what we know (y=15 and x=3):

**Is it possible to be proportional to a function?**

It is also possible to be proportional to a square, a cube, an exponential, or other function! A stone is dropped from the top of a high tower. The distance it falls is proportional to the square of the time of fall. The stone falls 19.6 m after 2 seconds, how far does it fall after 3 seconds?

## What does it mean for two variables to be directly proportional?

When two variables are directly proportional, it means that one is a constant multiple of the other. For example, in the equation y = 16x, y is directly proportional to x, because y is just some constant multiple of x. (In this case, the constant multiple is 16.)