Does the equation 2x + 8= y represent a direct variation? If so, what is the constant of variation?
Stacey Warren - Expert brainly.com
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If it is direct variation, you should be able to multiply x by something to get y---no addition or subtraction.
y = 3x
y = .25x
y = (1/3)x
these are all direct variation
y = 3x + 2
y = .25x - 1
y = (1/3)x + 7
these are not direct variation
direct variation or not? solve each for y and see if there is any addition or subtraction over with the x. If there is, it is NOT direct variation. If you only have something multiplying the x (even an implied 1), the constant will be the coefficient of x.
figure out what you have to multiply x by to get y. In the end you need to get to:
y = ?x --where ? is whatever you'll multiply with x to get y.
or you could solve for ?---
y = ?x
y/x = ?x/x
y/x = ?
so to find out what ? is, simply divide y by x. Then write your equation in y = ?x format.
Hope that gives you enough help to do the work. It shouldn't be too bad.