?→A:?→B:?→M:B-MA→Y:

?→Y:AM-:M^-1(Y-B→M◢B-MA→Y

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Pt. slope form : input pt then slope. You find Y-intercept on the right corner. Its stored in variable Y.

2 Pt. Form : input 2 pt in the sequence of (x,y). Output slope and Y - intercept.

Slope stored in M

Y - intercept stored in variable Y.