Solution :
Equation for Malcom's family travels after t hours is d = 65 t
From the graph, equation for Theo's family travels after travels after t hours is
[tex]$d=\frac{225}{4.5}t$[/tex]
[tex]$d=50 t$[/tex]
For Malcom's family, speed [tex]$= \frac{d}{t}$[/tex] = 65 miles per hour
For Theo's family, speed [tex]$= \frac{d}{t}$[/tex] = 50 miles per hour
Malcom's family traveled faster than Theo's family by
= (65-50) miles per hour
= 15 miles per hour
