Answer:
slope means the monthly salary is $425
Explanation:
4050 - 3200 / 6 - 4 = 850 / 2 which is same as 425 / 1
4475 - 4050 / 7 - 6 = 425 / 1
4900 - 4475 / 8 - 7 = 425 / 1
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