The table shows the number of cell phone towers a company will build as the number of its customers increases. Complete a and b below.

Customers (thousands) Towers
5.25 273
6.25 325
7.25 377
9.25 481

Is the relationship between number of towers and number of customers proportional? Explain

A. No. The ratios of towers to customers are not all equivalent.
B. Yes. The ratios of towers to customers (thousands) are all equivalent to a unit rate of​