Which of the following functions has a range of all real numbers?
f(x)=x2f(x) = x^2f(x)=x2
f(x)=∣x∣f(x) = |x|f(x)=∣x∣
f(x)=2x+5f(x) = 2x + 5f(x)=2x+5
f(x)=10f(x) = 10f(x)=10