Question

True or False
Given f(x)=x-4, there is a zero of f(x) at x=0

Answer 1

False, when x = 0, you are finding the y intercept, zeroes are x intercepts

Answer 2

When you plug in x = 0, you get


f(x) = x-4


f(0) = 0-4


f(0) = -4


Since this result is NOT zero, this means that x = 0 is NOT a zero.


So the statement is false.

Answer 3

Here's the graph
http://puu.sh/r0ad

Answer 4

Thanks everyone :)