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Question 109362This question is from textbook algebra2 with trigonometry
: What is the y-intercept of 3x-y=7? Please help me with this problem! Thanks.
This question is from textbook algebra2 with trigonometry
Answer by bucky(2189)   (Show Source):
You can put this solution on YOUR website! The y-intercept is the value of y when x is equal to zero. (Think of it as any point that
is on the y-axis has an x-value of zero).
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The equation you were given is:
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3x - y = 7
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Set x equal to zero and this equation becomes:
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3*0 - y = 7
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The 3*0 is equal to zero and can, therefore, be dropped from the equation to leave just:
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-y = 7
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You are trying to solve for +y so all you need to do in this case is multiply both sides
of the equation by -1 to get:
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y = -7
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That's the answer ... the y-intercept is the point (0, -7) and the graph of the given equation
you started with crosses the y-axis at -7
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Hope this helps you to understand the problem a little better.
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