Compare the parent functions in the following answer choices. Which parent function is periodic and has an intercept at (0,0)?
y=cosx
y=sinx
y=10x
y=x2-2
The parent functions in the answer choices are:
1. y = cos(x) - periodic function with intercept at (0,0)
2. y = sin(x) - periodic function with intercept at (0,0)
3. y = 10x - linear function with intercept at (0,0)
4. y = x^2 - 2 - quadratic function with intercept at (0,0)
Both y = cos(x) and y = sin(x) are periodic functions and have an intercept at (0,0). These functions repeat their values after a certain period, while y = 10x and y = x^2 - 2 are non-periodic functions.