What is the constant of proportionality in the direct variation represented on the following graph? a) 1/4 b) -4 c) 4 d) -1/4

1) for direct variation
y = kx
(4,1)
1=k*4
k=1/4 Answer

2) also you can find this constant as a slope (m) , because this is a linear function when y=mx+b, when b=0.
slope =rise(change over y) /run (change over x)= 1/4