Can you show that this quadrilateral is a parallelogram

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?

How do you write a paragraph proof to prove that the corresponding angles shown are congruent

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2