Using a Phone Card to Make a Long Distance Call $\$ 0.88$

Multiple Choice

Using a phone card to make a long distance call costs a flat fee of $\$ 0.88$ plus $\$ 0.25$ per minute starting with the first minute. What is an equation of the form $y = m x + b$ for this situation?

A) $y = 0.88 x + 0.25$
B) $y = 0.25 x$
C) $y = 0.25 x + 0.88$
D) $y = 0.88 x$