Lisa is standing on a dock beside a lake. she drops a rock from her hand into the lake. after the rock hits the surface of the lake, the rock's distance from the lake's surface changes at a rate of −2 inches per second. if lisa holds her hand 4 feet above the lake's surface, how far from lisa's hand is the rock 5 seconds after it hits the surface?

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

4 + 5 7/9= 9 7/9

step-by-step explanation: