Function 1: y = 4x + 5 function 2: the line passing through the points (1, 6) and (3, 10). which of these functions has the greater rate of change? a) function 1, because the slope is 5 and the slope of function 2 is 4. b) function 1, because the slope is 4 and the slope of function 2 is 2. c) function 2, because the slope is 7 and the slope of function 1 is 5. d) function 2, because the slope is 5 and the slope of function 1 is 4.