Chapter 15 // Shape Function Graphing Drills 1, 2, 3, 4, 5, 6, 7, 8, 9 - Principles & Practice Using C++

In this exercise I am using Visual Studio 2017 and the graphics files found here:
https://github.com/l-paz91/principles-practice/tree/master/Graphics%20Files

Chapter 15 // Function Graphing Drills

1. Graph the function  double one(double x) {return 1;} in the range [-10,11] with (0,0) at (300,300) using 400 points and no scaling (in the window).
2. Change it to use x scale 20 and y scale 20.
3. From now on use that range, scale, etc. for all graphs.
4. Add double slope(double x) {return x/2;} to the window.
5. Label the slope with a Text "x/2" at a point just above its bottom left end point.
6. Add double square(double x) {return x*x;} to the window.
7. Add a cosine to the window (don't write a new function).
8. Make the cosine blue.
9. Write a function sloping_cos() that adds a cosine to slope() (as defined above) and add it to the window.

Github: https://github.com/l-paz91/principles-practice/tree/master/Chapter%2015/Function%20Graphing%20Drills%202

All of these functions can be found from section 15.2 to 15.3.2. If you have already followed along with the chapter you will have done them.

Drill 2-1:

Drill 2-2:

Drill 2-3, 2-4:

Drill 2-5:

Drill 2-6:
It annoys me that this one doesn't scale

Drill 2-7, 2-8:

Drill 2-9: