Answers2025-2026_MDCPS_1205070-MJ Grade 8 Pre-Algebra Sem 1-CRUnit Test — Unit testQuestion 4
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Unit Test — Unit test

Question 4 • 2025-2026_MDCPS_1205070-M/J Grade 8 Pre-Algebra Sem 1-CR

Four plumbers each charge a flat fee plus an hourly rate for repair visits. The table shows their total costs for repairs that required various amounts of time.Total Cost of RepairsHours needed for repairCost for plumberACost for plumberBCost for plumberCCost for plumberD1$35$55$50$502$65$75$75$603$95$95$100$70Which plumber charges the greatest hourly rate?

Answer
A
plumber A
B
plumber B
C
plumber C
D
plumber D

Explanation

Compare how much each plumber’s cost increases for each additional hour. Plumber A’s cost rises from $35 to $65 to $95, an increase of $30 per hour, which is greater than B’s $20, C’s $25, and D’s $10 per hour. Therefore, plumber A charges the greatest hourly rate.

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