use your graphing calculator to check whether r= -9 and r= -11 are solutions to the equation r^2 + 11r + 28 = 10

y1=
y2=

proposed solutions | x | y1 | y2
-9 | ? | ?
-11 | ? |?

r= -9 is/is not a solution?
r= -11 is/is not a solution?