Zeros of a Function
Definition: an input-value that corresponds with an output-value of zero.
With an Equation
Plug in 0 for the output (often 𝑦 or 𝑓𝑥). Solve for the input (often 𝑥 or 𝑡). The solutions are the zeros.
With a Graph
Look at the 𝑥-intercepts. The zeros are the 𝑥-values of these points.
In a Table or List of Points
Look for the output-value of zero. The corresponding input-value is a zero.
𝑥
𝑓𝑥
−10
2
−5
0
0
−4
5
−3
10
11
15
0
𝑔𝑡=𝑡2−9