x-intercept of a line from y = mx + b
The x-intercept is where the line crosses the x-axis, so set y = 0 and solve for x.
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See worked examples
What is the x-intercept of the line y = −6x − 3?
Answer: -1/2
What is the x-intercept of the line y = −x + 6?
Answer: 6
What is the x-intercept of the line y = −3x − 3?
Answer: -1
Tip: The x-intercept is where the line crosses the x-axis, so set y = 0 and solve for x.
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