You can put this solution on YOUR website! y=14.7(x-20)+130.6
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Distribute the 14.7 to terms inside the parenthesis:
y=14.7x - 14.7(20) + 130.6
y=14.7x - 294 + 130.6
y=14.7x - 163.4 (this is what they're looking for)
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where:
slope (m) is 14.7
y-intercept is at (0, -163.4)