To draw a graph, take y=x+5
first, put x=0 and get the value of y then put y=0 and get the value of x
If x=0 then y=5
If y=0 then x=-5
So points are (0,5);(-5,0) using these points plot the graph
To find the zeroes of x+5
put x+5=0 you get x=-5
so x=-5 is zeroes of x+5