Respuesta :

ktreyb
21. y = - 3x + 4
22. y = x + 2
23. y = - 1/2x
24. y = 4
25. y = 1/4x + 7/4
26. y = - 3/2x - 7/2

If using y isn't what you're looking for, replace it with f(x) since they are identical in the equation.