Question

Which equation represents a proportional relationship? y = 9x y = 9x , y = 9x + 1 y = 9x + 1 , y = 9x + 9

Answer 1

Answer:

{y,x}={441​,45​}

Step-by-step explanation:

// Solve equation [2] for the variable  y

 [2]    y = x + 9

// Plug this in for variable  y  in equation [1]

  [1]    (x +9) - 9x = -1

  [1]     - 8x = -10

// Solve equation [1] for the variable  x

  [1]    8x = 10

  [1]    x = 5/4

// By now we know this much :

   y = x+9

   x = 5/4

// Use the  x  value to solve for  y

   y = (5/4)+9 = 41/4