find the constant of proportionality and unit rate for the data in the table. Then write the equation to represent the relationship between time t and distance d

Time Distance
2 hrs 90 miles
3 hrs 135 miles
5 hrs 225 miles
6 hrs 270 miles

i need to show how to do it in steps.

3 answers

1 hr 45 miles
Whats the unit rate? And how would i show my work?
2/90 = 1/x

Cross multiply and solve for x.