If f(x) is a continuous function defined for all real numbers, f(-1)=1, f(-5)=-10, and f(x)=0 for one and only one value of x, then which of the following could be that x value?

Question

a) -6
b) -5
c) -4
d) 0

Answer 1

It's D.
You'll have to plot the given Points and see which could be possible value of x when f(x) is Zero.