Hello :) pls help thank you very much!

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How do you determine whether a relationship represented as as graph is linear or nonlinear

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.

1. how do you convert the repeating, nonterminating decimal 0. to a fraction? explain the process as you solve the problem.