Which of the following linear functions have a positive slope

What is 32+4 x (16 x 1/2) -2 show your work}

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4

Tom and lilly rented a house for $12,000 last year. at the start of the year they bought the house they had been renting directly from the owner for $250,000. they believe they could rent it for $12,000 this year, but stay in the house. how much does tom and lilly’s decision to buy the house change gdp? a. it reduces gdp by $12,000 b. it does not change gdp c. it raises gdp by $238,000 d. it raises gdp by $250,000