(a) Laura owns 6 shares of a certain stock. Yesterday the total value of her shares went down by
2 answers:
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There are two ways to approach this.
Option #1:
Use the slope formula .
That value is undefined, so the slope is undefined.
Option #2:
Because the two points have the same x-value, they will be vertically above/below one another. This means your line is a vertical line and the slope of a vertical line is undefined.
Either way, your slope is undefined.