Let
x--------> the number of hours Shonda jogs
y---------> the total number of miles jogged
we know that
A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form
or

in this problem
the unit rate
represent the slope of the linear equation or the value of the constant of proportionality k
so
the linear equation is

using a graphing tool
see the attached figure
the answer in the attached figure