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What is the (y)-intercept of the line (y=-x-9)?
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Answer and explanation
Correct answer: \(-9\)
To find the y-intercept, put x=0. Then y=-0-9=-9, so the line meets the y-axis at \((0,-9)\) and its y-intercept is \(-9\). Here, \(-1\) is the slope, not the y-intercept. Exam tip: In y=mx+c, c is the y-intercept.
Frequently asked questions
What is the correct answer to this question?
\(-9\)
Why is this the correct answer?
To find the y-intercept, put x=0. Then y=-0-9=-9, so the line meets the y-axis at \((0,-9)\) and its y-intercept is \(-9\). Here, \(-1\) is the slope, not the y-intercept. Exam tip: In y=mx+c, c is the y-intercept.
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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