posted by Cynthia .
A 5-mile cab ride costs $9.30. A 11-mile cab ride costs $17.70. Find a linear equation that models cost c as a function of distance d.
Treat the data as two ordered pairs (5,930) and (11,1770) of the form (d,c)
take the slope, then find the equation in the form
c = md + b ( just like y = mx + b)