Kacie ran at the constant speed as she traveled from 100-meter point to 300-meter point on the running track. It took her 35 seconds to run 200-meter distance.
Find if number of seconds since Kacie passed 100-meter point on track is proportional to distance Kacie ran past the 100-meter point.
Write the formula to relate quantities distance ran past 100-meter point and amount of time elapsed since passing 100-meter point as she run from 100-meter point to 300-meter point on track.