Theseare the two pointsin question.You can see that the line rises4 unitsas it travels2 unitsto the right.
So, the rise is 4 unitsand the run is 2 units.Since4 ÷ 2 = 2, the slopeof this line is 2.
Noticethat the slopeof the line in example1 was 2, a positivenumber. Any line with a positiveslopewill
travelup from left to right.Any line with a negativeslopewill traveldownfrom left to right.Checkthis fact
in example2.
Example 2
Whatis the slopeof the line that travelsthrough(1,9) and (3,3)?Use the formulaagainto identifythe slopeof this line.The slopeof this line in Example2 is It will traveldownto the right.The pointsand the line that connects
themis shownbelow.