The y-intercept of the linear function is y = 0.
A linear function is modeled by:
y = mx + b
In which:
The y-intercept is given by (0,a) = (0,-a). From this, we have that for it to be a function, a = -a, and the only value that respects this condition is a = 0, hence the y-intercept of the linear function is y = 0.
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