The graph shows how many of each type of book was checked out from the library. How many fewer history books were checked out than adventure and fantasy books combined?

Books Checked Out
Adventure: 8
Fantasy: 10
History: 6
Sports: 4

the answer is c.

for continuous functions, they continue in the same pattern and you have to find that pattern kinda like slope

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system