Direct Variation

First of all, I am new ,so hello.

now to the topic:
is the formula for direct variation y=kx
and could you please post examples?

Quote:

---

Originally Posted by Russian

First of all, I am new ,so hello.

now to the topic:
is the formula for direct variation y=kx
and could you please post examples?

---

This is correct. y varies directly as x.

k is called the constant of proportionality or the constant of variation.

Google: direct variation - Google Search

Quote:

---

Originally Posted by masters

This is correct. y varies directly as x.

k is called the constant of proportionality or the constant of variation.

Google: direct variation - Google Search

---

so you use the formula and then plug the answer as k?

Quote:

---

Originally Posted by Russian

so you use the formula and then plug the answer as k?

---

Example: d = rt (distance = rate X time)

Let r be the constant of variation.

The distance (d) varies directly as time (t) if r remains constant. In other words, when t increases, d increases. When t decreases, d decreases.

Follow some of the links I gave you and you'll see other examples.

Also, investigate inverse and joint variation as well.

Quote:

---

Originally Posted by masters

Example: d = rt (distance = rate X time)

Let r be the constant of variation.

The distance (d) varies directly as time (t) if r remains constant. In other words, when t increases, d increases. When t decreases, d decreases.

Follow some of the links I gave you and you'll see other examples.

Also, investigate inverse and joint variation as well.

---

thank you, masters