Sanjay consulted three electricians about upgrading the wiring in his home. Each electrician uses a linear formula that incorporates a flat base fee and an hourly rate to determine the cost of service. Those formulas are shown in the table. Repair Cost Formulas Electrician Cost in y dollars for an x-hour service 1 y = 25 x + 30 2 y = 30 x + 25 3 y = 25 x + 20 Which statement is best supported by the table? Each electrician charges a different hourly rate. Each electrician charges a different base fee. All three electricians charge the same hourly rate. All three electricians charge the same base fee.
Answers
Given : Each electrician uses a linear formula that incorporates a flat base fee and an hourly rate to determine the cost of service.
1. y = 25x + 30
2. y = 30x + 25
3. y = 25x + 20
To Find : Which statement is best supported by the table?
Each electrician charges a different hourly rate.
Each electrician charges a different base fee.
All three electricians charge the same hourly rate.
All three electricians charge the same base fee.
Solution:
1. y = 25x + 30 hourly rate. = 25 Base fee = 30
2. y = 30x + 25 hourly rate. = 30 Base fee = 25
3. y = 25x + 20 hourly rate. = 25 Base fee = 20
Each electrician charges a different hourly rate. - INCORRECT as two electrician charge same 25 as hourly rate
Each electrician charges a different base fee. - TRUE / CORRECT
30 , 35 & 20 - all are different
All three electricians charge the same hourly rate. INCORRECT
25 ≠ 30
All three electricians charge the same base fee. INCORRECT
25 ≠ 30 ≠ 20
Each electrician charges a different base fee is best supported by the table
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Answer:
b- Each electrician charges a different base fee.
Step-by-step explanation:
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