Week 7 math 10

This week in math 10 we learnt about linear relations and functions. We also talked about relations and t-charts along with intercepts. We learnt about the domain and range as well as how to find them. I think the most important thing we learnt this week was function notation. This is helpful because it is how you figure out points on a graph. Function notation is like an equation or rule, where u place the input into the equation to find the output.

For example, if the questions is: 

f(x) = 2x + 3

And the question is asking for:

f(2)

You will place the x value (2) into the equation:

f(2) = 2(2) + 3, then evaluate:

f(2) = 4 + 3

f(2) = 7

Once you find the answer to the equation you can write these as coordinates:

(2,7) and place them on your graph:

The function notation can help you determine and evaluate all the points in your function and place them on the graph, function notation can also be written in other forms such as mapping notation, or as an equation:

f : x —> 2x + 3

Y = 2x + 3

These are the same as the first example and will give the same answer, but are just written in different forms.