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In the line (y=9x+8), by how much does (y) increase when (x) increases by (1)?
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Answer and explanation
Correct answer: 9
In the form y=mx+c, m is the slope. Here, the coefficient of x is 9, so when x increases by 1, y increases by 9. The number 8 is the y-intercept; it does not represent the rate of increase of y. Exam tip: in y=mx+c, the coefficient of x is the slope.
Frequently asked questions
What is the correct answer to this question?
9
Why is this the correct answer?
In the form y=mx+c, m is the slope. Here, the coefficient of x is 9, so when x increases by 1, y increases by 9. The number 8 is the y-intercept; it does not represent the rate of increase of y. Exam tip: in y=mx+c, the coefficient of x is the slope.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Slope and y-intercept.
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