a=

b=

B = (1.74, 0.98)
A = (-1.34, -1.22)
l = Line(A, B)
C = Intersect(l, yAxis)
bl: y(C)
l2 = Line(C, B)
m = Slope(l2)
a = 0.7142857142857143
inputBox1 = Textfield(a)
f(x) = m * x + bl
mx = If(x(B) ≟ 0, NaN, y(B) / x(B))
text1: "$f(x)=" + (LaTeX[f]) + "$"
b = -0.26285714285714273
inputBox2 = Textfield(b)
changeb = 0.1