Respuesta :

9514 1404 393

Answer:

  A.  0.4

Step-by-step explanation:

Rearranging the equation for the graph, we get ...

  (height)(width) = constant

Using any of the points on the graph, we find the constant to be ...

  (0.5)(0.8) = 0.4 = constant

The constant is 0.4, choice A.