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If (y=-2x+c) has (y)-intercept (7), what will (y) be at (x=6)?
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Answer and explanation
Correct answer: -5
In the form y=mx+c, the y-intercept is c. Since the y-intercept is 7, c=7. Substituting x=6 gives y=-2(6)+7=-12+7=-5. Option 5 results from missing the negative sign. Exam tip: first identify c from the y-intercept, then substitute the given value of x.
Frequently asked questions
What is the correct answer to this question?
-5
Why is this the correct answer?
In the form y=mx+c, the y-intercept is c. Since the y-intercept is 7, c=7. Substituting x=6 gives y=-2(6)+7=-12+7=-5. Option 5 results from missing the negative sign. Exam tip: first identify c from the y-intercept, then substitute the given value of x.
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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