From the graph, we can infer that the domain of the function is [0,4].
Remember that
. From the graph we can infer that
and
, so Michael drove at a rate of
.
Now, If Michel had driven 5 miles per hour faster for the entire ride, the new rate will be
. To find the new domain, we need to find the new time. since
,
.
We can conclude that the new domain will be
, or in decimal form: