Answer if you only know all of them (1) The value of y varies directly with x. If x = 4, then y = 20. What is the value of x when y = 60?
(A) 5
(B) 7
(C) 12
(D) 44
(2) Use a graphing calculator to model the data using a linear function.
What is the correlation coefficient of the data?
(A) −0.88
(B) −0.73
(C) 0.53
(D)0.85
(3) A group of people tried an exercise program for various amounts of time to see if it would help them to lose weight. This table shows the relationship between the number of weeks each person spent on the exercise program and the number of pounds they lostWhich function best models the data?
(A) y=−2x+1.8
(B) y = 0.59x + 1.15
(C) y = 0.17x + 2
(D) y=−0.5x+3.5