Respuesta :

Answer:

  • r = 10/3
  • c = 10/3·g

Step-by-step explanation:

Pick any point that is clearly on the line. (g, c) = (12, 40) is the end point, so will do nicely. The value of r (the constant of proportionality) is the slope of the line, which is the ratio of the y-value of the point to the x-value (or c to g, in this case).

  r = c/g = 40/12 = 10/3  . . . . . . the exact value of the constant r

Then your equation is ...

  c = 10/3g . . . . . . put the value of r where r is in the equation you are given

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