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In the equation [ y = - 1x + b ], the y-intercept is 'b'.

Take the point you know ... (60, 70) ... and plug it into the equation:

y = - x + b

70 = - 60 + b

Add 60 to each side:

130 = b

And there you have it!

The y-intercept is 130 .

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โˆ™ 2010-12-15 04:04:09
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Q: I have the equation Y equals -1x plus b and the starting coordinates 60 70 how do i find the y- intercept the line is going from right to left on the X axis?
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