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Answer:
slope = 5
Step-by-step explanation:
slope of a line = y2 -y1 / x2 - x1
where x1 =4.5 x2 =2 y1= 2.5 y2 = -10
slope = -10 - 2.5 / 2 - 4.5
slope = -12.5 / -2.5
slope = 5