The formula of a slope:

We have the points (-6, -1) and (-6, 4).
Substitute:

Dividing by 0 is not possible, therefore the slope is undefined.
<em>It's a vertical line x = -6</em>.
Answer: $95
Step-by-step explanation:
Te new price will be 90 + 5x, if the price increases "x" times
The number of wind chimes sold per month will become 140 - 7x

Therefore, if the price becomes (90 + 5(1)) = $95 per wind chime, then the revenue will be maximum
You put .875 over the number 1 to make it a fraction so
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