def makePyramid(basePoints):
    xVals = [x for x,y in basePoints]
    pyramid = []
    pyramid.append(basePoints[0])
    pyramid.append(basePoints[1])
    pyramid[1].append((basePoints[1][1] - basePoints[0][1]) / (basePoints[1][0] - basePoints[0][0]))
    for x in range(2, n):
        pyramid.append(basePoints[x])
        for y in range(x):
            pyramid[x].append((pyramid[x][y + 1] - pyramid[x - 1][y + 1]) / (xVals[x] - xVals[x - (y + 1)]))
    coefficients = []
    for x in range(n):
        coefficients.append(pyramid[x][x + 1])
    return coefficients