What is the (y)-intercept of the line (y=3x-4)?
Answer and explanation
Correct answer: -4
In the form (y=mx+c), the constant term (c) is the (y)-intercept because substituting (x=0) gives (y=c). Here, in (y=3x-4), (c=-4), so the (y)-intercept is -4. The number 3 is the slope, not the (y)-intercept. Exam tip: To find the (y)-intercept, put (x=0) in the equation.
Frequently asked questions
What is the correct answer to this question?
-4
Why is this the correct answer?
In the form (y=mx+c), the constant term (c) is the (y)-intercept because substituting (x=0) gives (y=c). Here, in (y=3x-4), (c=-4), so the (y)-intercept is -4. The number 3 is the slope, not the (y)-intercept. Exam tip: To find the (y)-intercept, put (x=0) in the equation.
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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