This video is about 15 minutes long, which is a bit much but I wanted to get all the revision in one place. This video will review solving for x, area of circles and rectangles, writing equations, perimeter of triangles, using trig to find angles and probability. The questions are in that order so feel free to scan forward to the part you want.

Below are the key videos I think are most useful to revise for your upcoming week. Please check these out and post a comment to let me know you visited.

Distance = speed x time

Pie charts – angles and percentages

Scattergraphs

Scaling drawings

Trigonometry in the real-world

Probability of events happening, or not happening

As promised, there are several videos here that cover different areas of expressions and formulae. Here is the first, featuring pie charts (no one mentioned pie charts but they are good to see).

Here is volume for a cylinder

Area of a Trapezium

Gradient of a line

Patterns and Sequences

Frequency Tables

and Statistical Measures (no one asked for this one either)

What are equations actually used for? Often, they exist to show trends or help businesses make predictions. If a business has developed an equation for expected sales or profit, they usually try to graph the equation to forecast what to expect. Check out the video to see two example equations being plotted onto a graph.

alt video if the first won’t work – content is the same

When you have an equation, like y=3x-5, y is the subject because y is the result you are aiming to find. In this case, changing the subject means to make the equation about x.

Here is a video showcasing a couple examples of that.

Scattergraphs are a way of plotting what is called bivariate data. This is data that is related but there is still a bit of variety in what is presented. There are two videos here. One to quickly show how Excel can make a tidy graph of the data and one where you need to think about your scale and axes before you start plotting the points.

Welcome to the class, this month we will be aiming to progress through some Nat 4 exam questions that focus on relationships, expressions and equations, and some other key facts and concepts. I aim to have here a preview of some of the questions you are likely to see with a walkthrough of how they can be solved. You can watch these videos before lessons, after lessons and potentially during them. Each video stops short of revealing the answer.

Here is the first one that focuses on checking the angle:

This one involves solving for a side by multiplying:

This one involves solving for a side by dividing: