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


x_in = 10.0
p0 = 2.5
p1 = 3.0

out1 = fun_lin(x_in, p0, p1)
out2 = fun_lin(a=p0, b=p1, x=x_in)

print('out1 = ', out1)
print('out2 = ', out2)