Which model correctly represents the product of (x+3) and (x+4)?
C
B
D
A
The ordered pairs in the sets shown below are of the form (x,y). In which sets is y a function of x?
{(1,3),(3,1),(3,4),(4,3)}
{(1,3),(2,6),(3,1),(6,3)}
{(0,3),(1,4),(2,4),(2,8)}
{(1,-2),(1,0),(1,5),(1,7)}
The depth of a lake, d, varies directly with r, the amount of rainfall last month. If k is the constant of variation, which equation represents the situation?