Is 75′ long enough snake for a laundry drain?

From the best plumber in Vancouver WA 98682

My mother paid 400 dollars to have the laundry drain snaked 5 years ago. It is backing up again and I am trying to save her some money. Home depot appears to rent automatic snakes. I am unsure how to know if I need a 50′, 75′ or 100′ snake. Any advice would be very much appreciated.

submitted by /u/Moz4
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From the top plumbing contrator Vancouver WA 98682