In the rule (y=125-5x), what does (5) represent?
Answer and explanation
Correct answer: Amount of decrease per step
In
y=125-5x
, the term
-5x
means that when
x
increases by 1, the value of
y
decreases by 5. Therefore, 5 is the amount of decrease per step. The number 125 is the initial value; a positive coefficient would indicate growth. Exam tip: In a linear rule
y=a+bx
, a negative
b
indicates decrease, and its magnitude gives the decrease per step.
Frequently asked questions
What is the correct answer to this question?
Amount of decrease per step
Why is this the correct answer?
In
y=125-5x
, the term
-5x
means that when
x
increases by 1, the value of
y
decreases by 5. Therefore, 5 is the amount of decrease per step. The number 125 is the initial value; a positive coefficient would indicate growth. Exam tip: In a linear rule
y=a+bx
, a negative
b
indicates decrease, and its magnitude gives the decrease per step.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
