# SOLUTION: I don't know how to figure this out On thursday marie worked for 6 hours and handled 20 calls. On friday marie worked 8 hours and handled 30 calls. If she worked 4 hours how many c

Algebra ->  Algebra  -> Linear-equations -> SOLUTION: I don't know how to figure this out On thursday marie worked for 6 hours and handled 20 calls. On friday marie worked 8 hours and handled 30 calls. If she worked 4 hours how many c      Log On

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 Question 104389: I don't know how to figure this out On thursday marie worked for 6 hours and handled 20 calls. On friday marie worked 8 hours and handled 30 calls. If she worked 4 hours how many calls did she take? Please help I think the m=5 but i'm not sure what to do next.Answer by stanbon(57347)   (Show Source): You can put this solution on YOUR website!On thursday marie worked for 6 hours and handled 20 calls. On friday marie worked 8 hours and handled 30 calls. If she worked 4 hours how many calls did she take? --------- You have two points: (6,20) and (8,30) slope = (30-20)/(8-6) = 5 Equation form is: calls = (slope)(hours)+b Substitute to find "b", as follows: 20 = 5*6 + b b = -10 EQUATION: calls = 5(hours)-10 ------------ Let # of hours be 4 Then # of calls = 5*4-10 = 10 -------------- Marie took 10 calls ============== Cheers, Stan H.