how can you find the constant of proportionality when given a certain situation

Question

mathmale · Answer

Direct or indirect proportion?  What happened to your previous post of this same question?

nikki_skellington · Answer

Direct and no one answered

mathmale · Answer

I answered, but you apparently deleted your post and started anew.

All right.  Direct proportion.

Which equation models direct proportion?

mathmale · Answer

Hint:  It's a linear equation.

nikki_skellington · Answer

what do you mean by models like a graph. if so i know how to create the graph

mathmale · Answer

Direct proportion is usually represented by the linear equation    y = k x.
That 'k' is called the "constant of proportionality."

Have you seen other algebra problems like this one before?

nikki_skellington · Answer

no this is my first time learning this

mathmale · Answer

Have you looked up "direct proportion" on the Internet?

mathmale · Answer

What is your primary source of info regarding new topics?  I can't imagine jumping into problem solving without first having read about the subject matter at hand.

nikki_skellington · Answer

its flvs my home school program

mathmale · Answer

Suppose y is linearly dependent on x.

Write the general equation showing this fact.

Suppose, now, that if x=2, y=5.  Find k.

How are you expected to learn new concepts in your home schooling?  Ideally someone would help you just enough to get you started, and then depend on you to get the rest through reading and asking pertinent questions.

mathmale · Answer

" y is linearly dependent on x" or "y is directly proportional to x" is writtten as y = k x.

Using the given info, find k, please.

mathmale · Answer

Nikki?     I'm sorry, but I need to get off the 'Net.  I can wait only so long for responses from you.   I'll be on the 'Net again later today, or perhaps someone else could continue this discussion.