The line (y=-11x+c) has (y)-intercept (7). What will (y) be at (x=-3)?
Answer and explanation
Correct answer: 40
The y-intercept is the value of y when x=0, so c=7. Substituting x=-3 gives y=-11(-3)+7=33+7=40. The value 44 can result from incorrectly adding 11 to 33. Exam tip: identify the constant term from the y-intercept and carefully handle signs when multiplying negative numbers.
Frequently asked questions
What is the correct answer to this question?
40
Why is this the correct answer?
The y-intercept is the value of y when x=0, so c=7. Substituting x=-3 gives y=-11(-3)+7=33+7=40. The value 44 can result from incorrectly adding 11 to 33. Exam tip: identify the constant term from the y-intercept and carefully handle signs when multiplying negative numbers.
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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