lines.py

matrix = [[' ' for j in range(50)] for i in range(15)]

xa = 5 
ya = 5

xb = 45
yb = 15



# Calculate the parameters of the curve y = ax + b

a = (yb - ya) / (xb - xa)
b = ya - a * xa



# Draw the curve on the matrix
for x in range(xa, xb):
    y = round(a * x + b)%15
    matrix[y][x] = '*'


# Print the matrix
for row in matrix:
    print(''.join(row))