Set 8: Linear Functions (Intermediate)

Choice A is correct. Choice A is the correct answer. Set equations equal. 1. Equate: $2x = x + 4$. 2. Solve for x: Subtract $x$ $\rightarrow x = 4$. 3. Solve for y: Substitute back $\rightarrow y = 2(4) = 8$. 4. Point: $(4, 8)$. Strategic Tip: The intersection point is the solution to the system of equations. Choice B is incorrect because check $y=2 x$ ($4 =4$) but $y=x+4$ ($4 =2+4$) fails. Choice C is incorrect because fails first equation. Choice D is incorrect because fails second equation.