Understanding Y-Intercept and X-Intercept: The y-intercept is where $x = 0$; the x-intercept is where $y = 0$.

Example of Finding Intercepts: For $y = 200 – 50x$, the y-intercept is $200$, and the x-intercept is $4$.

Finding the Intersection of Two Lines: Set equations equal to solve for $x$ and substitute back to find $y$, giving the point of intersection.

Real-World Interpretation of Intersection: Here, the intersection point $(2.5, 75)$ means that both travellers are 75 miles from the park after 2.5 hours.

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