Question 983601
It is a line with slope 5 (before the x) and y-intercept (where x=0) at 5. Slopes of 5 are steep, up and to the right.

Here is the graph.

{{{graph(300,200,-10,10,-10,10,4x+5)}}}

Way 2:
Table of points
Use small numbers for x

X=0, y=5. (0,5) is one point. 
X=1, y=5+4(1); 5+4=9. (1,9) is another. 
2 points determine a line. If it is y as a function of x, as it is here, 
Draw a line between the two points. You are done.