If (y=mx-7) has slope (5), what will (y) be at (x=4)?
Answer and explanation
Correct answer: 13
The line is \(y=mx-7\), where \(m\) represents the slope. Since the slope is 5, \(m=5\). Substituting \(x=4\), we get \(y=5\times4-7=20-7=13\). Therefore, option B is correct. \(20\) is only \(5\times4\); the subtraction of 7 is still required. Exam tip: First replace \(m\) with the given slope, then substitute the value of \(x\).
Frequently asked questions
What is the correct answer to this question?
13
Why is this the correct answer?
The line is \(y=mx-7\), where \(m\) represents the slope. Since the slope is 5, \(m=5\). Substituting \(x=4\), we get \(y=5\times4-7=20-7=13\). Therefore, option B is correct. \(20\) is only \(5\times4\); the subtraction of 7 is still required. Exam tip: First replace \(m\) with the given slope, then substitute the 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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