Use the graph to find the value of the function

Step-by-step explanation:

You could do this one of 2 ways.  First is to look at the graph and locate x = 0. That is the y-axis.  ON the y axis, the cosine curve is at a y value of 1.  Second way is to go to your calculator and, in degree mode, hit cos(0) and you'll see that it is 1.

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.