Question

Time (hours). distance (miles)

2. 90
3. 135
5. 225
6 . 270


a. find the constant of proportionality

b. use the constant of proportionality to write a unit rate for the data in the table.

c. write an equation to represent the relationship between time, t, and distance, d.

Answer 1

A) 90 / 2 = 45

135 / 3 = 45

225 / 5 = 45

270 / 6 =45

The constant of proportionality is 45

B) The unit rate would be 45 miles per hour

C) The equation would be to multiply the constant ( 45 miles per hour) by the time ( number of hours) to get the total distance:

D = 45t