What is the (y)-intercept of the line (y=2x+9)?
Answer and explanation
Correct answer: 9
The y-intercept is the y-value where the line meets the y-axis, so x=0. Substituting x=0 in y=2x+9 gives y=2(0)+9=9. Therefore, 9 is correct. The number 2 is the coefficient of x, or the slope, not the y-intercept. Exam tip: In the form y=mx+c, the constant term c is the y-intercept.
Frequently asked questions
What is the correct answer to this question?
9
Why is this the correct answer?
The y-intercept is the y-value where the line meets the y-axis, so x=0. Substituting x=0 in y=2x+9 gives y=2(0)+9=9. Therefore, 9 is correct. The number 2 is the coefficient of x, or the slope, not the y-intercept. Exam tip: In the form y=mx+c, the constant term 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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