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After sales tax, a $260 fancy watch costs $286. What is the sales tax percentage?
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Answer:
y = -4x + 8
Step-by-step explanation:
Slope-Intercept Form: y = mx + b
Slope Formula:
Step 1: Find slope <em>m</em>
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m = -4
y = -4x + b
Step 2: Find y-intercept <em>b</em>
4 = -4(1) + b
4 = -4 + b
8 = b
Step 3: Rewrite linear equation
y = -4x + 8