A simple rule to tell whether a graph is a function is to pretend to cut it vertically, if any cut intercept the graph twice, it is not a function. otherwise, it is. In this case, the heart is not a function, because if you cut it up-down direction, your imaginary knife will touch the edge of the heart twice. I hope this explanation helps.<span />
Juan’s lunch would have costed less if he paid separately. his lunch is 5.25 the bill 37.20 37.20 / 5 $7.44 each kid 7.44 - 5.25 = 2.19 $2.19 less if he paid separately
