If (Y(t)=96-12t), what is the decrease from (Y(3)) to (Y(4))?
Answer and explanation
Correct answer: 12
Y(3)=96-12(3)=60 and Y(4)=96-12(4)=48. Therefore, the decrease from 60 to 48 is 60-48=12. The term -12t means that Y decreases by 12 whenever t increases by 1; 24 would be the decrease over two steps. Exam tip: for consecutive values in a linear expression, use the magnitude of the coefficient of t.
Frequently asked questions
What is the correct answer to this question?
12
Why is this the correct answer?
Y(3)=96-12(3)=60 and Y(4)=96-12(4)=48. Therefore, the decrease from 60 to 48 is 60-48=12. The term -12t means that Y decreases by 12 whenever t increases by 1; 24 would be the decrease over two steps. Exam tip: for consecutive values in a linear expression, use the magnitude of the coefficient of t.
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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