Is there a direct proportion in 2y-5=x? if there is one, what is the constant of proportionality?

This is not a direct proportion



Explanation:

Solve for y
2y-5 = x
2y = x+5
y = (x+5)/2
y = (x/2) + (5/2)
y = 0.5x + 2.5

The last equation is in the form y = mx+b where m = 0.5 is the slope and b = 2.5 is the y intercept. The y intercept must be b = 0 in order for the graph to go through the origin. Since b = 2.5 is not zero, this is why we don't have a direct proportion.

Note: direct proportions are often written in the form y = k*x which is basically y = mx+b, but the m has been replaced with k and the b is removed (because b = 0) 

820,000 is the answr