28 .what is the slope of the line that passes through the points ( 3,9 ) and ( 6,12 ).
A.1/2 B.-1/2 C.1 D.-2
29.find the slope of the given below.
A.2 B.1 C.1/2 D.0
30.find the slope of the given below.
A.5/3 B.-5/3 C.3/5 D.5/3
