what is the problem with the design of the following experiment?

sandra has three dogs: a husky, a golden retriever, and a chihuahua. she wonders what types of food dogs like the most. she feeds the husky and golden retriever a bowl of fish flavored dog food in the morning. then she takes them on a long walk and feeds them chicken flavored dog food for lunch. then they rest at home for the afternoon, and she feeds them beef flavored dog food for dinner. she feeds the chihuahua a cheeseburger for every meal.

Sandra serves the chihuahua a cheeseburger in every meal so there is no other option available for the chihuahua. Because of that, Sandra finds it difficult to know the choice of the chihuahua.

Given that Sandra has a husky, a golden retriever and a chihuahua.  The husky and golden retriever has a set routine for all three meals of the day.

The husky and golden retriever has a bowl of fish-flavored food in their first meal. Then they go for walk and have chicken-flavored food for lunch. They take a rest in the afternoon and have beef-flavored food for dinner.

The chihuahua has only a cheeseburger in every meal. He does not go for walk or take a rest at home in the afternoon. He has no choice of food for the meals. In other words, the chihuahua has a monotonous routine for all meals of the day. So because of this, Sandra finds it difficult about the choice of the chihuahua.

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The chihuahua has no choice, so how can she determine what food the dog would prefer.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.