Answer:
Hₐ = The mean temperature in Dallas in July is strictly greater than 97° F.
Explanation:
This is the answer because the question is asking you for the "alternative hypothesis" and that means that it's basically asking for the statement that agrees with what is being said.
Since we know that a student the researcher claims that the average temperature is increasing...
Then, the answer choice we choose must signify that the temperature is ONLY increasing.
Which leads us to the answer:
Hₐ = The mean temperature in Dallas in July is strictly greater than 97° F.
(Emphasis on "strictly greater")
P.S - I took the test and got a 100%. Good luck! (Especially if you're a senior like me!)