I wrote a program for a math project on a TI 84 plus calculator using conic sections. the calculator will then draw the program and make a picture. at the top of the program our instructions say to put the following commands- clrdraw, zoomsquare, and axes off.i put those commands at the top and my program was executing fine. now all the sudden it's telling me my zoom is "undefined" and i don't know what that means, and my project is due in 8 hours! please help me!
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