Question

4. Johnny's Cab charges a fixed cost of $3.75 plus $1.25 per kilometer.a.Write an equation that relates the fare to the distance travelled.b.What is the total cost for a 21-km ride?

Answer 1

a.

- The independent value is $3.75.

- The dependent value is $1.25 because it depends on the kilometer ride.

- Let us set x for each kilometer.

- Let us set F for the toral fare

Then, we can write the next equation that relates the fare to the distance.

`F=3.75+1.25x`

b.

If we want to find the total cost for a 21-km ride. Then, we need to set x=21 on the equation.

Hence,

`\begin{gathered} F=3.75+1.25(21) \\ F=30 \end{gathered}`

Hence, a 21-km ride has a total cost of $30.