HELP PLEASE !!! Which of the following could be an example of a function with a domain (-infinity,infinity)and a range(2,infinity),there are multiple answers...
a y=-(3)^x-2
b y=3^x+2
c y=0.25^x+2
d y=-(0.25)^x-2

Question

HELP PLEASE !!! Which of the following could be an example of a function with a domain (-infinity,infinity)and a range(2,infinity),there are multiple answers...
a y=-(3)^x-2
b y=3^x+2
c y=0.25^x+2
d y=-(0.25)^x-2

anonymous · Answer

okay, a range of (2, infinity) means that no matter what number x is, the lowest number y could be is 2. Since A and D have a y-intercept of -2, which equations do you think will never have a y value below 2?

anonymous · Answer

thats the thing im not sure

anonymous · Answer

b and c lol

anonymous · Answer

there ya go!

to start, i would have just plugged 0 into all the equations and see what y values come out

anonymous · Answer

im not good at this stuff bro,could you just give me the answer with an explanation and i can learn from that

anonymous · Answer

you were right, the answer is B and C because 2 is the lowest number that the function could ever reach, no matter what x you put in. 

when it says the domain is (-infinity, infinity) it means that x can be ALL real numbers

when it says the range is (2,infinity) it means that y must be greater than 2 for all values of x

anonymous · Answer

i really appreciate it man

anonymous · Answer

yw