Sunday

January 25, 2015

January 25, 2015

Posted by **K** on Tuesday, November 15, 2011 at 7:53pm.

- Math -
**MathMate**, Tuesday, November 15, 2011 at 8:15pmThis can be reduced to 12y=x³, or

y=x³/12

Direct variation have two properties:

1. it passes through the origin, i.e. if x=0, y=0.

This property is satisfied by the above equation.

2. x and y are both linear, i.e. if you multiply x by any finite number, y increases by the same ratio.

For example, for the above,

x=1, y=1/12

x=2, y=8/12 (y is increased 8 times instead of 2), so the equation is not a direct variation.

Example of a direct variation:

y=2x

x=1, y=2

x=2, y=4

x=7, y=14

So the ratios are always 2:

2/1 = 4/2 = 14/7 =2 (equals the coefficient of x).

**Answer this Question**

**Related Questions**

math 012 - will someone please double check my answer to this problem. the ...

algebra - what expression raised to the third power is 81x^12y^8z^16 answer is ...

Math - simplify the following expression and show your problem solving strategy ...

Algebra - Can someone show me step by step how to do this problem to have an ...

algebra - if you have the sign of > or < does this also mean = ???? so ...

Math - Correct the error in this equation: 6(2y+6)=4(9+3y) 12y+36=36+12y 12y=12y...

math/chemisty - Find the volume of a starburst candy (220 cm cubed). The mass is...

math - Hi, How do I find the coefficient of variation? I found the sample ...

math - Hi, How do I find the coefficient of variation? I found the sample ...

math/algebra - solve each of the following systems by substitution. 16) 5x -2y...