Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s). At the end of Lisa's typing class, she records her time and the number of words typed. The total number of words that Lisa can type, y, is proportional to the time it takes her to type, x, in minutes, as represented in the given table.

Time, x (minutes) Number of Words, y
2 64
4 128
5 160
The equation that represents the relationship between x and y is y =

x.

After a few more months of practice, Lisa can type 152 words in four minutes. The new equation that represents this relationship is y =

x.