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Determine whether y varies directly with x. If so, find the constant of variation k and write the equation.
 one year ago
 one year ago
Determine whether y varies directly with x. If so, find the constant of variation k and write the equation.
 one year ago
 one year ago

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benzillaBest ResponseYou've already chosen the best response.2
If y varies directly with x, then all the ratios will be the same. Here is an example if y is 2 when x is 1 and y is 4 when x is 2 and y is 6 when x is 3, then this shows direct variation. K=y/x. Now go back and determine if the numbers on your chart vary this way. In my example, you will notice they all vary by 2. If the y value is a same multiple of x for every x and y in your chart, then that is a direct variation.
 one year ago

ihavemathquestionsBest ResponseYou've already chosen the best response.0
whats the answer?
 one year ago

max0236Best ResponseYou've already chosen the best response.1
So you have to find the constant variation and write the equation \[\frac{ y }{ x } = \frac{ 11 }{ 7 }=\frac{ 13 }{ 8 }=\frac{ 15 }{ 9 }=\frac{ 17 }{ 10 }=?\]From what I can see it does not seem to have any variation. for example \[\frac{ 6 }{ 3 }=\frac{ 2 }{ 1 }=\frac{ 4 }{ 2 }= \frac{ 12 }{ 6 }=2\] here the y varies directly with x. The constant of variation is 2. The equation is y = 2x.
 one year ago

max0236Best ResponseYou've already chosen the best response.1
A linear function written in the form y = kx , where k is not equal to 0 represents direct variation. The slope, k, is constant. The constant, k , is often referred to as the constant of variation. You can write the constant of variation as a ratio y : x . And unless someone else has any ideas I go with no variation that's the best I can do
 one year ago

benzillaBest ResponseYou've already chosen the best response.2
Max you are correct. 13/8 does not equal 11/7
 one year ago
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