AlgebraMediumy-intercept from standard form with a negative y coefficient
Algebra practice question
What is the y-intercept of the line 4x − 2y = 10 in the xy-plane?
Answer: -5 or −5
On the y-axis, x = 0: −2y = 10, so y = −5.
Common wrong answers
- If you answered 5
- 5 forgets the negative sign on the y term: −2y = 10 gives y = −5.
- If you answered 10
- 10 is the constant on the right side, before dividing by −2.
- If you answered 2.5
- 2.5 is the x-intercept (4x = 10), not the y-intercept.
More Algebra questions
- Medium
A system: 2x + y = 11 and x − y = 1. What is the value of x + y? - Medium
Which of the following describes all solutions to 4x − 9 ≤ 2x + 5? - Medium
A phone's battery percentage is modeled by P = 100 − 8t, where t is the number of hours since it was unplugged… - Medium
If y = 2x − 1 and 3x + y = 14, what is the value of x? - Medium
If |2x − 3| = 7, what is the sum of all possible values of x? - Medium
Line k has equation y = (2/3)x + 1. Which equation represents a line perpendicular to line k?
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