2
4
6
−2
−4
−6
1
2
3
−1
−2
−3
−4
0,0
–
o
+
←
↓
↑
→
a = 4.0
b = 3.0
x
2
a
2
+
y
2
b
2
=
x
2
16.00
+
y
2
9.00
=
1
(2.9923, 1.9909)
(drag me)
tangent
2
4
6
−2
−4
−6
2
4
−2
−4
−6
0,0
2
x
a
2
+
2
y
b
2
⋅
d
y
d
x
=
0
⇒
d
y
d
x
=
−
x
a
2
⋅
b
2
y
=
−
9
x
16
y
(2.9923, -0.8454)