Answer:
slope means the monthly salary is $425
Step-by-step 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
