Grade 9 math · C.5 · Functions
Find the y-intercept of a line
In y = mx + b, the y-intercept is b.
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What is the y-intercept of the line y = −3x?
Answer: 0
What is the y-intercept of the line y = 3x?
Answer: 0
What is the y-intercept of the line y = −3x + 6?
Answer: 6
Tip: In y = mx + b, the y-intercept is b.
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