Wednesday
July 30, 2014

Homework Help: algebra

Posted by stressed on Sunday, May 13, 2007 at 10:33pm.

I have no clue what to do here can you tell me how to figure this?

If y varies directly with x, and y = 500 when x = 200, find the constant of variation k.

Whenever you have a statement such as
"....y varies directly with x..."

you can write it as an equation y = kx, where k is some constant

so in your case they give you x=200, y=500
sub those values into the equation and you can solve for k

This is an example of a direct variation.
You can also have an "inverse variation", such as...
"The Time taken for a trip varies inversely with the speed"

then your equation would be Time = k(1/speed), again where k is some constant.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

math - t varies directly as the square root of l. If l=81, then t=10 what is the...
Variation - I have few questions that I need checked please and could you help ...
Math - This is regarding direct variation. y varies directly as the square of R...
algebra1 - M varies directly with n; m=144 when n=8. What is the constant of ...
Math - DIRECT VARIATION 1. a is directly proportional to b.If a=15,then b=9 2. m...
algebra - Find the variation constaant and an equation of variation where Y ...
Math-Algebra - 1. The surface area of a cube varies directly as the square of ...
Algebra II - 1. If y varies directly as x, and y=30 when x=4, find the constant ...
Annuities - Victore French mad a deposit of 5000 at the end of ech quarter to ...
Math-Algebra - 1. The area of a square varies directly as the square of its side...

Search
Members