Set 12: Linear Functions (Advanced)

Choice A is correct. Choice A is the correct answer. Identify the rate and starting value. 1. Rate (Slope): $30per month $$\rightarrow 30 m. 2. Start (Intercept): $50one-time fee $$\rightarrow + 50. 3. Equation: $C = 30 m + 50$. Strategic Tip: The number associated with the variable (per month, per hour) is the slope. The one-time fee is the y-intercept. Choice B is incorrect because it swaps the monthly rate and joining fee. Choice C is incorrect because it subtracts the joining fee. Choice D is incorrect because it adds the two numbers together as a single rate.