Answer all the questions below and press submit to see how many you got right.
Function : A function is a mapping in which every element in one set is mapped to exactly one element of a second set. Most often the mapping is described using a rule. For example the function $f(x)=x+1$ maps 2 to 3 and -1 to 0.
Graph : The graph of a function is the set of points $\{(x,f(x))\}$ that can be blotted in a coordinate system.
The above picture shows that graph of the function $f(x)=$_______.
Expression : An expression is a succession of constants, variables and mathematical operations that if evaluated for specific values of the variables represents a number.
What is the value of the expression $x^2$ for $x=7?$
What is the value of the expression $(x+1)(x-1)$ for $x=6?$