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What is the (y)-intercept of the equation (3x+4y=20)?
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Answer and explanation
Correct answer: 5
To find the y-intercept, put x=0. Then 3(0)+4y=20, so 4y=20 and y=5. Hence, the line meets the y-axis at (0,5), and its y-intercept is 5. The number 20 is the constant term, not the y-intercept. Exam tip: always set x=0 to find a y-intercept.
Frequently asked questions
What is the correct answer to this question?
5
Why is this the correct answer?
To find the y-intercept, put x=0. Then 3(0)+4y=20, so 4y=20 and y=5. Hence, the line meets the y-axis at (0,5), and its y-intercept is 5. The number 20 is the constant term, not the y-intercept. Exam tip: always set x=0 to find a 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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