x value = 4          8          blank        40                                          y value= 3            6          12          30                       ratio of y to x=3 to 4          6 to 8          12 to blank       30 to 40.                thats all the info

 

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1 Answer

The double number line shows values of x and related values of y in the required ratio. When x=4, y=3 so when y=12, x=16.

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