In the line (y=9x-1), what are the slope and (y)-intercept?
Answer and explanation
Correct answer: Slope 9, y-intercept −1
The slope-intercept form of a line is y = mx + c, where m is the slope and c is the y-intercept. In y = 9x − 1, the coefficient of x is 9, so the slope is 9; the constant term is −1, so the y-intercept is −1. Option C incorrectly interchanges these values. Exam tip: In y = mx + c, the coefficient of x is always the slope.
Frequently asked questions
What is the correct answer to this question?
Slope 9, y-intercept −1
Why is this the correct answer?
The slope-intercept form of a line is y = mx + c, where m is the slope and c is the y-intercept. In y = 9x − 1, the coefficient of x is 9, so the slope is 9; the constant term is −1, so the y-intercept is −1. Option C incorrectly interchanges these values. Exam tip: In y = mx + c, the coefficient of x is always 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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