Suppose a 5-minute overseas call costs $5.91 and a 10-minute call costs $10.86. The cost of the call and the length of the call are related. Identify the variables in this situation:
x=
y=

What is the given information in this problem (find all that apply)?
y-intercept=
slope=
point = (5, 5.91) and (10, 10.86)

Write an equation to model the situation.