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What is the value of (y) at (x=0) in the line (y=16-8x)?
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Answer and explanation
Correct answer: 16
Substituting x=0 in the equation gives y=16-8(0)=16. Therefore, the value of y at x=0 is 16; this is also the y-intercept. The value -8 is the slope, or coefficient of x, not the value of y. Exam tip: To find the y-intercept, always put x=0.
Frequently asked questions
What is the correct answer to this question?
16
Why is this the correct answer?
Substituting x=0 in the equation gives y=16-8(0)=16. Therefore, the value of y at x=0 is 16; this is also the y-intercept. The value -8 is the slope, or coefficient of x, not the value of y. Exam tip: To find the y-intercept, always put x=0.
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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