The TI-84 has ruled math classes for decades. Can cheaper calculators gain ground?

SAT and AP tests now offer free digital graphing options for students, but it’s harder than it seems for school districts to look beyond Texas Instruments. [Image text:] Z4 K4G M D= by T'C(1-c) H=PP+V HlyHJ=ih yt 86 g+/g= t (B) Cyx7P=-ih B+C 4(y) 3 5A2 +4 + X BA Y- gOB)+-y R=50 to 4-3(1) +-+ y= t-to ysl /2(8 window 200m CT3 mode trace =++1/a+ del .e. nath Stat N sin COS-1 COS tan 45 23 dt 8my3 D 47 -9<(R 92 TI-84 EVo +=? x2 dt Sk+k2) K2 E=mce E=(p)+(m) CKA 94h h =n X0 N24 8T Tr C R=BD 4t ROtFd=Fd f ? (3 RC +)