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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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14y ago

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