5) It is known that there is a linear relationship between the cost of a taxi, C, in dollars and the distance travelled, d, in kilometres. This relationship can be represented by a straight line equation. When I travel 15km the taxi costs
me $32.20 and when I travel 20km with the same company, the taxi costs
me $41.70.

Develop algebraically, the linear equation, C = 1.9 d + 3.7, which
shows the relationship between the cost of the taxi, C, in terms of the
distance travelled, d.