Direct variation is one variable is proportionate to the other variable. If you take a closer look at −7x=−56y, you can see that these two are proportionate if you divide by −7 or −56.
You can also come to this conclusion by noting that there are no y-variable and x-variable without getting the origin. A line with direct variation goes through the origin.
To find the constant variation, you want the y to be free of any coefficient. To make −56y into just y, you need to divide the whole problem by −56. This becomes y=18X. Remember that a direct variation equation is y=kx. K is the constant of variation (constant variation). Thek in y=18X is 18.
Hope this helped.
