The graph for this scenario will have the following key features:
(1) it will show the number of cats as a function of time (ie., at a given week)
(2) the graph will be linear, showing a linear relationship between the number of cats and time
(3) the slope of the line will be 4, since every week there will be 4 more cats in the shelter than the week before
(4) the y-intercept will at 14 because at time 0 (week 0) there were 14 cats to start with.
(5) The function in slope intercept form:
y = 4*x + 14
Let me know if you have questions.