If (C(d)=25+5d), by how much will (C(d)) increase when (d) increases by (1)?
Answer and explanation
Correct answer: 5
In C(d)=25+5d, the coefficient of d is 5. When d increases by 1, the term 5d increases by 5, so C(d) also increases by 5. The constant term 25 does not change when d changes. Exam tip: In a linear expression a+bd, b gives the change in the value for a 1-unit change in the variable.
Frequently asked questions
What is the correct answer to this question?
5
Why is this the correct answer?
In C(d)=25+5d, the coefficient of d is 5. When d increases by 1, the term 5d increases by 5, so C(d) also increases by 5. The constant term 25 does not change when d changes. Exam tip: In a linear expression a+bd, b gives the change in the value for a 1-unit change in the variable.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.
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