-5 is the intercept since y=mx+b, b being the intercept.
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I think it would require 100 workers since 1 worker digs up 1 yard.
Hope this helps.
Answer:
slope = 5/8
Step-by-step explanation:
use the slope formula to find the slope: 

Answer:
19
Step-by-step explanation:
Range is solved by subtracting the lowest and highest numbers which int his case is 70 and 89 so that make 19