Answer:
Yellow cab: m = (12 - 6)/2 = 6/2 = 3
y = 3x + 6
Blue cab: m = (12 - 2)/2 = 10/2 = 5
y = 5x + 2
1) Call the blue cab: $5 + $2 = $7
2) Call the yellow cab: $12 + $6 = $18
3) 2 miles, $12
4) $17 - $15 = $2 difference
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