SOLUTION: A train operating company sells tickets prices using the equation y=0.8+0.2x, where y is the ticket prices in pound and x the number of miles traveled. 1) work out the cost of a

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A train operating company sells tickets prices using the equation y=0.8+0.2x, where y is the ticket prices in pound and x the number of miles traveled. 1) work out the cost of a      Log On


   

Question 944445: A train operating company sells tickets prices using the equation y=0.8+0.2x, where y is the ticket prices in pound and x the number of miles traveled.
1) work out the cost of a ticket for a 4 miles journey
2)the cost of a 5 miles journey
3) graph the equation and use it to answer the following
(a) the miles traveled if the cost is 3 pounds
(b) cost when the miles traveled are 1.5 pounds
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1) y=0.8%2B0.2%284%29=0.8%2B0.8=1.6
2) y=0.8%2B0.2%285%29=0.8%2B1.0=1.8
3)

a) When the cost is 3 pounds, follow the green line until it intersects.
Looks like about 11 miles.
Verify using the equation.
0.8%2B0.2x=3
0.2x=2.2
x=11
.
.
b) When the cost is 1.5 pounds, follow the blue line until it intersects.
Looks like about 3.5 miles.
0.8%2B0.2x=1.5
0.2x=0.7
x=3.5