def fun_lin(x, a, b):
    y = a*x + b
    return y

inn = 10.0
p0 = 2.5
p1 = 3.0

ut1 = fun_lin(inn, p0, p1)
ut2 = fun_lin(a=p0, b=p1, x=inn)

print('ut1 = ', ut1)
print('ut2 = ', ut2)