Turtle - Graphing Calculator

Objectives:

• You will practice creating while loops
• You will integrate loops into drawing graphics with Python's turtle
• You will create a basic graphing calculator

Resources:

• Python Turtle Reference

Directions:

1. Name your file: turtleGrapher.py:
2. Set your turtle's speed to the fastest: speed(0)
3. Prompt the user for the width of the window and store in a variable named width
4. Prompt the user for the height of the window and store in a variable named height
5. Change the dimensions of the window by using setup(width, height) and then screensize(width, height)
6. Draw a line that represents the x-axis
7. Draw a line that represents the y-axis
8. Using textinput(), prompt the user to enter an equation (e.g. 2*x+3) and store it in a variable: eq
9. Write a while loop where x starts at -width/2 and goes all the way through width/2
   1. Inside the while loop, use eval to get the y-value of the equation: y = eval(eq)
   2. Tell the turtle to goto(x, y)
10. Tell the turtle window to exit when it is clicked

Advanced: (Optional)

• Once you have the basic calculator working, try to implement a zoom feature that draws the equation bigger
• Draw the tick marks on the x and y-axes