Question

date
cell phone graph
cost (y-axis: $0, $0.10, $0.20, $0.30, $0.40, $0.50, $0.60, $0.70, $0.80, $0.90, $1.00, $1.10, $1.20)
minutes (x-axis: 0,1,2,3,4,5,6,7,8,9,10)
(plotted points at various (x,y) coordinates)

Explanation:

Since the problem (e.g., finding the slope, equation of the line, or cost per minute) isn't specified, let's assume we need to find the cost per minute (slope) from the graph.

Step1: Identify two points

Take (1, $0.05$) and (2, $0.15$) (approx from the graph, or more accurately, (1, $0.05$) and (10, $0.70$)). Let's use (0, 0) and (10, $0.70$) for simplicity (since at 0 minutes, cost is $0$).

Step2: Calculate slope (cost per minute)

Slope $m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{0.70 - 0}{10 - 0} = 0.07$ dollars per minute.

Answer:

The cost per minute is $\$0.07$ (or adjust based on exact points; this is a sample calculation).