While Edward was visiting his sister in Westminster, he bought a toothbrush that was marked down 80% from an original price of $
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<h2>Answer:</h2>
First: info on point-slope form.
- Formula: <em>y - y₁ = m(x - x₁)</em>
We need to find the slope of the line first.
Slope:
Now we can complete the point-slope equation of the line.
*These equations are equivalent.