Can you please answer and explain these?

Quiz: Chapter 12 Homework Qu X purses/699301/quizzes/1001458/take/questions/17450872 u may use notes, the homework, and the text in completing this quiz. Question 1 5 pts In a large study of the relationship between parental income and the IQs of their children, the following results were obtained: average income = $90,000, SD = $45,000 average IQ = 100, SD - 15, r = 0.50 For each income group ($0-$9999, $10,000-$19,999, $20,000-$29,999, etc.), the average IQ of children with parental income in that group was calculated and then plotted above the midpoint of the group ($5,000, $15,000, $25,000, etc.). It was found that the points on this graph followed a straight line very closely. The slope of this line (in IQ points per dollar) would be about: 3,000 1/1,500 can't say from the information given 500 1/6,000 6,000 O 1/3,000 1/500 O 1,500 Next MacBook Air