The Jones family bought two burgers and one hot dog, paying a total of $4.82. The Smith family bought one burger and two hot dog
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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