An exponential function is graphed in the xy-plane. If the graph of the function is always decreasing and has a y-intercept of 20, which of the following could be the function's equation?A. y = -20(1.75)^xB. y = 20(1.75)^xC. y = -20(0.75)^xD. y = 20(0.75)^x

Question
Answer:
D. y = 20(0.75)^x,
for function to be decreasing value under exponent should be less than 1,
y(int) can be found when x=0
y = 20(0.75)^0=20*1=20
solved
general 10 months ago 3978