The linear equation of relating two objects can be written in the form, y = ax + b Our x is the number of passenger and y is the weight (in tons). Using the first two conditions, 10 = 60(a) + b 13 = 84(a) + b The values of a and b from the equations are 0.125 and 2.5. For 50-passenger bus, y = (50)(0.125) + 2.5 The value of y is 8.75.
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