What is a function?

A function from a set X to a set Y is a rule of correspondence that assigns to each element x in X exactly one element y in Y. A function is usually denoted by a letter such as f, g, or h. The set X is called the domain of f. The set of corresponding elements y in the set Y is called the range of the function. The unique element y in the range that corresponds to a selected element x in the domain X is called the value of the function at x, or the image of x, and is written f(x). Since the value of y depends on the choice of x, y is called the dependent variable and x is called the independent variable. There are many types of functions such as linear, quadratic, piecewise-defined, combining and inverse functions. For example a linear function is f(x)=ax+b where a doesn't equal 0 and a and b are constants. 

What I learned this week in Mathland!

I have learned so many things in Mathland this week from real numbers all the way to the midpoint formula. The class went over what is a rational and non rational number and what's an integer again. We also learned inequalities again, understanding when to use an open and closed circle. I learned something totally new this week called the Sign Chart Method which helps to write an inequality an interval form. This week, we also went over the properties of absolute value, distance and midpoint formula. After solving an inequality, we learned how to graph it on a number line as well as drawing the point on a rectangular coordinate system. This week was a review for me, which helped me get back into my school mode.

Myself and things to know about me!

My name is Marissa Dickey and I am a junior at Maranatha High School. I play two sports: soccer and tennis and I even go skiing sometimes. I have played soccer for twelve years now and I am going to switch to a new sport which is tennis. I also have many hobbies such as cooking, reading, traveling and sailing. I love traveling and I hope to go to Europe one day and see the Vatican and all the famous sites surrounding it. One of my favorite places to travel is Canada because the weather is beautiful and it's not crowded like California. I am also Canadian and have many relatives there. Although my dream destination is probably Greece. Apart from my hobbies and sports, I have two dogs and only one sibling. My family is indeed very small.