Question

Select the correct answer.Which function has a domain of (-infinity,infinity ) and a range of (-infinity,4]?= r +4o o- 2 + 4= -40f(x) = 2* + 4Submit

Answer 1

The only function from the options that has domain all real numbers and range (-inf,4] is the quadratic function:

$f(x)=-x^2+4$

since its graph is the following parabolla:

notice that it is defined on all real numbers on the x-axis, but the range is defined from 4 to minus infinity on the y-axis