If (y=mx-5) has slope (4), what will (y) be at (x=3)?
Answer and explanation
Correct answer: 7
In the line equation \(y=mx-5\), \(m\) represents the slope. Since the slope is 4, \(m=4\). Substituting \(x=3\) gives \(y=4\times3-5=12-5=7\). Therefore, 7 is correct. Getting 9 would result from incorrectly adding the constant term \(-5\). Exam tip: first identify the value of \(m\), then substitute the given value of \(x\).
Frequently asked questions
What is the correct answer to this question?
7
Why is this the correct answer?
In the line equation \(y=mx-5\), \(m\) represents the slope. Since the slope is 4, \(m=4\). Substituting \(x=3\) gives \(y=4\times3-5=12-5=7\). Therefore, 7 is correct. Getting 9 would result from incorrectly adding the constant term \(-5\). Exam tip: first identify the value of \(m\), then substitute the given value 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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