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Which of the following lines has x-intercept and y-intercept that are
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26 Mar 2021, 10:17
26 Mar 2021, 10:17
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Which of the following lines has x-intercept and y-intercept that are integers?
A. \(y=3x+1\)
B. \(y=\sqrt{x}+1\)
C. \(y=-\frac{2}{x}\)
D. \(y=x^2-1\)
E. \(xy=1\)
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
A. \(y=3x+1\)
B. \(y=\sqrt{x}+1\)
C. \(y=-\frac{2}{x}\)
D. \(y=x^2-1\)
E. \(xy=1\)
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
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Re: Which of the following lines has x-intercept and y-intercept that are
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26 Mar 2021, 10:27
26 Mar 2021, 10:27
Carcass wrote:
Which of the following lines has x-intercept and y-intercept that are integers?
A. \(y=3x+1\)
B. \(y=\sqrt{x}+1\)
C. \(y=-\frac{2}{x}\)
D. \(y=x^2-1\)
E. \(xy=1\)
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
A. \(y=3x+1\)
B. \(y=\sqrt{x}+1\)
C. \(y=-\frac{2}{x}\)
D. \(y=x^2-1\)
E. \(xy=1\)
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
IMPORTANT POINT #1: The y-intercept is the point where the x-coordinate is 0
So, let's plug x = 0 into each answer choice.
We get:
A. y= 3(0) + 1 = 1. Integer - KEEP
B. y = √0 + 1 = 1. Integer - KEEP
C. y = -2/0 undefined. ELIMINATE
D. y = 0² - 1 = -1. Integer - KEEP
E. (0)y = 1. When we solve for y, y is undefined. ELIMINATE
We're left with A, B and D
IMPORTANT POINT #2: The x-intercept is the point where the y-coordinate is 0
So, let's plug y = 0 into each answer choice.
We get:
A. 0 = 3x + 1 Solve to get x = -1/3. Not an integer. ELIMINATE
B. 0 = √x + 1 Unsolvable for x. ELIMINATE
D. 0 = x² - 1 x = 1 or -1, Both are integers. KEEP!
Answer: D
Which of the following lines has x-intercept and y-intercept that are
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30 Mar 2024, 06:57
30 Mar 2024, 06:57
Hello Brent, Carcass... pls help me understand this
B. 0 = √x + 1 Unsolvable for x. ELIMINATE... if 0 = √x + 1 can we not say √x = -1 then square both sides to get x = 1?
B. 0 = √x + 1 Unsolvable for x. ELIMINATE... if 0 = √x + 1 can we not say √x = -1 then square both sides to get x = 1?
