Answer:
In standard form: x - 2y = -10
In slope intercept form: y = (1/2)x + 5
Step-by-step explanation:
y = total cost
y = flat cost + mileage cost
The flat cost is $5, so you get
y = 5 + mileage cost
The mileage cost depends on the number of miles, x.
1 mile costs $0.50
2 miles cost $0.50 * 2
3 miles cost $0.50 * 3
x miles cost $0.50 * x, or simply 0.5x
Now we add the mileage cost to our expression.
y = 5 + 0.5x
y = 0.5x + 5
In standard form:
0.5x - y = -5
x - 2y = -10
In slope intercept form:
y = (1/2)x + 5