Answer:
Step-by-step explanation:
Straightline equation problem
given data
charges per hour= $25
service fee= $40
time =3 hours
the equation can be represented using the equation of line
y=mx+c
y= the total charges
x= the number of hours
c= the service fee
m= the charge per hour
y=25x+40-------------1
for x=3
y=25(3)+40
y=75+40
y=115
the total is $115