Simple Intercept Calculator Python 3

For simple Linear Equations, just something I made up real fast for practice. Code Below
#pythoncode #interceptCalculator #Program

#Intercept Calculator Solve X and Y with data frame and graph (By Ralph Turchiano)
#2?+3=3?−1 To Truly undesrtand a Formula ,build it... ;-)
import pandas as pd
%matplotlib inline
from matplotlib import pyplot as plt
from matplotlib.pyplot import figure

def slope(a,b,c,d):
global x,y,df
y = 1
x = 1
gg = b + d*-1 # for x we just multiply the d constant to -1 then add to b
hh = b*-1 +d # for y we just multiply the b constant to -1 then add to d
x = gg/c
y = hh/a
df = pd.DataFrame ({'x': range(-10, 11)}) # dataframe size
df['y'] = (c*df['x'] + gg) / a
plt.style.use(['dark_background'])
with plt.style.context(('dark_background')): #graph size and color
figure(num=None, figsize=(12, 7), dpi=100, facecolor='black', edgecolor='b')
plt.plot(df.x, df.y, color="r")
plt.xlabel('x')
plt.ylabel('y')
plt.grid()
plt.axhline()
plt.axvline()
plt.annotate('x-intercept',(x, 0))
plt.annotate('y-intercept',(0,y))
plt.show()
df
return x,y ,df
print("Input Linear Equation as (ay + b = cx + d)")
a = float(input("a: "))
b = float(input("b: "))
c = float(input("c: "))
d = float(input("d: "))
slope(a,b,c,d)
print("Your value for x = ",x,"Your value for y = ",y)
df