Guillermo bought some reams of paper for $5 each and a $200 printer. he spent a total of $450.write and solve an equation to find the number reams of paper guillermo purchased

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?