This week we learned how to find the slope of 2 coordinates. We are trying to find rise over run (rise/run) which is slope.
Ex. (-2,-2)(-12,6)
x is the right number in the bracket and y is the left number in the bracket.
Rise=y and Run=x so, we want to find rise first because it is on top.
Rise is -2-6=-8
Run is -2-(-12)/ -2 +12= 10
The answer is -8/10 or -4/5
This week, we did a lot of preparing on the test and today, I took the test. One word that popped up frequently on the test was “Functions.” I wanted to make this weeks post about the definition of functions because, although it is very simple, when studying for the final exam, I want to be able to look at this post and remember this key word. The word function means to have only one partner or only having one input and one output. This is usually written as f(x) where x is represented as the input.
Ex. f(2)
f(x)=2x+5
f(2)=2(2)+5
f(2)=4+5
f(2)=9
This is an example of a function because, there was only one input (2) and one output (9.)
This week, we learned about inputs and outputs.
x=2
Ex. F(x)=2(x)+5
F(x)=2(2)+5
F(x)=4+5
F(x)=9
When you input the number 2, the output becomes the number 9.
This week, we learned how to write coordinates just from looking at a graph and its points.
For finding what coordinates go with the red dot, we have to first look at the x (horizontal) axis. From the fact that the dot is on the upper right corner, we know that the coordinates are going to be positive. The x coordinate is 3. This is because the red dot lines up with 3 on the horizontal line. To find the Y coordinates, you need to look at the vertical line. The y coordinate is also 3 because the red dot lines up with 3 on the vertical lines. When writing down the coordinates, you always put x before y (x,y.) The coordinate for the red dot on this graph is (3,3.)
For week 11, we mostly did preparation for the midterm and studying. I tried a lot of practice tests and I worked on my prime factorization because this concept is used through most of the chapters that are included in the midterm. When factoring, you take a number (ex.48.) You then, keep dividing the number until you get a factoring tree and all you have left is prime numbers (which you can’t divide anymore.)
