michael is 3 times as old as brandon. 18 years ago, Michael was 9 times as old as brandon. how old is michael now
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The slope of this line is the difference of the y values divided by the difference of the x values. Solving this give 4/-3. Then, you already know the b in y = mx+b, which is 2, because you already have the value (0, 2). So, the answer is y = x + 2