Suppose y varies directly with x. Write a direct variation equation that relates x and y.
y=10.4 when x=4
y=3.4x*
y=3.8x
y=3.2x
y=2.6x
I honestly don't understand this subject at all. Could you explain it to me please?
I don't really understand any of it. What is a direct Variation, how do I find it?
http://www.mathwords.com/d/direct_variation.htm
To write a direct variation equation that relates x and y, you need to determine the constant of variation, often denoted as k. The equation can then be written in the form y = kx.
Given that y varies directly with x, we can use the given values to find the constant of variation. When x = 4, y = 10.4.
To find k, we divide the value of y by the value of x: k = y/x.
In this case, k = 10.4/4 = 2.6.
Therefore, the direct variation equation that relates x and y is y = 2.6x.
y/x = 10.4/4 = 2.6
y = 2.6x
Geez! 3.4*4 = 13.6
Maybe you could show your work, so we can see where you are taking a wrong turn. Or are you just guessing so we'll think you tried?
What part of this don't you understand?
y/x = 10.4/4 = 2.6
y = 2.6x