Solution: Answers will vary.  

One way to create a heart is to use the graphs of two ellipses and restrict the domain.

2x²-2xy+y²-1=0 {x|x≥0}

2x²-2xy+y²-1=0 {x|x≤0}

Alternatively, you can solve for y and use the absolute value function, and then restricting the domain is unnecessary.

y=|x|+sqrt(1-x²)

y=|x|-sqrt(1-x²)

In either case, the result is a heart curve that looks like this: 

To move heart so that it covers (2,14), adjust the absolute value equations as follows:

The following polar equation will yield a cardioid:

r=1-sinθ 

Other heart-shaped graphs can be created using polar, parametric or rectangular equations. A number of examples can be found by performing a search on the web.