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What is the (y)-intercept of the line (y=7-3x)?
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Answer and explanation
Correct answer: 7
The line can be written in slope-intercept form as y=-3x+7. The y-intercept is the y-value when x=0. Substituting x=0 gives y=7, so the correct answer is 7. Here, -3 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?
7
Why is this the correct answer?
The line can be written in slope-intercept form as y=-3x+7. The y-intercept is the y-value when x=0. Substituting x=0 gives y=7, so the correct answer is 7. Here, -3 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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