Aradius of a circle is perpendicular to a chord if and only if it
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a. is equal in length to that chord
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b. bisects that chord
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c. parallels that chord
d. intersects the chord directly on the circumference
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When drawing a trend line for a series of data on a scatter plot, which of the following is true? a. there should be an equal number of data points on either side of the trend line. b. all the data points should lie on one side of the trend line. c. the trend line should not intersect any data point on the plot. d. the trend line must connect each data point on the plot.

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Plzzz i beg u so much asap ! what is the slope of this line? enter your answer in the box.