f(x)= 2 * 5^x
which facts are true about the functions

a. It is increasing
b.The y intercept is (0,5)
c.The y intercept is (0,2)
d.The domain of f(x) is all real numbers
e.The range of f(x) is y5
f.It is decreasing

Question

f(x)= 2 * 5^x
which facts are true about the functions

a. It is increasing
b.The y intercept is (0,5)
c.The y intercept is (0,2)
d.The domain of f(x) is all real numbers
e.The range of f(x) is y>5
f.It is decreasing

anonymous · Answer

$$f(x)=2\times 5^x$$?

anonymous · Answer

c

anonymous · Answer

definitely increasing because it is an exponential function and the base(5) is bigger than zero

anonymous · Answer

so a is correct.

anonymous · Answer

b is wrong because 
$$f(0)=2\times 5^0=2$$

anonymous · Answer

the above shows that c is correct as well.

anonymous · Answer

d is also correct. you can raise 5 to any power that you wish

anonymous · Answer

e is incorrect.  we already know that 
$$f(0)=2$$ so it makes no sense to say the range is 
$$y>5$$

anonymous · Answer

and if is incorrect because if it is increasing it cannot be decreasing!