If (y=(2u-1)x+(u+3)) has (y)-intercept (11), what is the slope?
Answer and explanation
Correct answer: 15
In the form y = mx + c, the y-intercept is c. Here, the y-intercept is u + 3, so u + 3 = 11 gives u = 8. Therefore, the slope is 2u - 1 = 2(8) - 1 = 15. Option 16 can result from forgetting to subtract 1. Exam tip: first find the parameter using the y-intercept, then substitute it into the coefficient of x.
Frequently asked questions
What is the correct answer to this question?
15
Why is this the correct answer?
In the form y = mx + c, the y-intercept is c. Here, the y-intercept is u + 3, so u + 3 = 11 gives u = 8. Therefore, the slope is 2u - 1 = 2(8) - 1 = 15. Option 16 can result from forgetting to subtract 1. Exam tip: first find the parameter using the y-intercept, then substitute it into the coefficient of x.
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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