Question

alberto is joining the besmart pro service for buying communication apps online. there are three pricing plans for apps:

• no plan with a high price per app
• basic plan with a low membership fee and a moderate price per app
• premium plan with a high membership fee and a low price per app

the following graphs show lines for the costs of the different plans on the same graph (numbers on the axes are not shown).

question 1: in the following graph, match the 3 lines to their plans.

cost
number of apps

solid green line:
dotted red line:
dashed blue line:

Explanation:

1. Solid green line: This line has a fixed starting cost (y-intercept) and a very gentle slope. The fixed cost is the membership fee, and the slope is the price per app. A gentle slope means a low price per app, and the high starting cost is the high membership fee, matching the Premium plan.
2. Dotted red line: This line has a low starting cost (low membership fee) and a moderate slope (moderate price per app), which matches the Basic plan.
3. Dashed blue line: This line starts at $0$ (no membership fee) and has a steep slope (high price per app), which matches the No plan.

Answer:

Solid green line: Premium plan with a high membership fee and a low price per app
Dotted red line: Basic plan with a low membership fee and a moderate price per app
Dashed blue line: No plan with a high price per app