If a line has slope (-10) and (y)-intercept (8), which equation is correct?
Answer and explanation
Correct answer: \(y=-10x+8\)
The slope-intercept form of a line is \(y=mx+c\), where \(m\) is the slope and \(c\) is the \(y\)-intercept. Substituting \(m=-10\) and \(c=8\) gives \(y=-10x+8\). Option A has the wrong sign for the slope because its slope is \(10\). Exam tip: the coefficient of \(x\) gives the slope, while the constant term gives the \(y\)-intercept.
Frequently asked questions
What is the correct answer to this question?
\(y=-10x+8\)
Why is this the correct answer?
The slope-intercept form of a line is \(y=mx+c\), where \(m\) is the slope and \(c\) is the \(y\)-intercept. Substituting \(m=-10\) and \(c=8\) gives \(y=-10x+8\). Option A has the wrong sign for the slope because its slope is \(10\). Exam tip: the coefficient of \(x\) gives the slope, while the constant term gives the \(y\)-intercept.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Slope and y-intercept.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
