Final answer:
An equation representing the number of miles Eman can walk over any time interval with x as the variable for time in minutes is y = 2.0 × x.
Step-by-step explanation:
To write a two-variable equation representing the number of miles Eman can walk over any time interval, we can use the equation of a line. Given the provided information, the equation of the line is y = 2.0 × t, where y represents the distance in miles and t represents time in minutes. Hence, if we want to use x as the variable as requested, the equation would be written as y = 2.0 × x, with the understanding that x stands for the time in minutes that Eman has been walking.