Y varies in direct proportion to x.
direct variation: y = kx y = kx k = y/x = 0.8/0.4 = 2
y = kx k = y/x = 21/-5 = - 21/5
use the formula y=kx
no. direct variation implies that you can simplify the problem into several forma which are equivalent to y/x = k in which k is called the constant of variation. one of these equivalent forms would by y = kx + 0 (slope intercept form) in which the y intercept must be 0 rearranging your equation gives a y- intecept of -14/35 which reduces to -2/5 since this is not zero. this is not direct variation.
yes y=kx is the formula for direct variation, and k represents constant of variation which can also be called slope.
The question is not clear. But if you want this in the form y=kx, then k must be 1.5
an equation of the form y = kx k is the constant of variation
direct variation: y = kx y = kx k = y/x = 0.8/0.4 = 2
You then have a linear relationship, or a direct variation. A straight line through the origin.
y=x/7 y=(1/7) x It is a direct variation since it is of the form y=kx, where k=1/7 , a constant
no. It must be an equation of the form y = kx.
y = kx: 10 = 37k so k = 10/37 and y = 10x/37
The constant of variation in a direct variation is the constant (unchanged) ratio of two variable quantities. The formula for direct variation is. y=kx (or y=kx ) where k is the constant of variation .
There are no "following" data!
y = kx k = y/x = 21/-5 = - 21/5
use the formula y=kx
It is 2/3.