Answer:
Step-by-step explanation:
The scale of the diagram as described in the task content is; 1: 8 where k= 8.
<h3>What is the scale of the diagram?</h3>
It follows from the task content that the original length of the room in discuss is 8cm. It therefore follows that the length of the room in the scale diagram is 1cm. On this note, the scale of the diagram in discuss is; 1 : 8 as 1cm on the diagram corresponds to 8cm actual length.
Read more on scale of diagrams;
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0.300 + .020 + 0.006 would be 0.326 in expanded form.
I think it would look like this 20:28 or 120:150
Gradient = 
This means the gradient is 4x.
The y intercept is where the line crosses the y axis. We can see this is at -3.
<h2>
Rule: <u>y = 4x -3</u></h2>
Substitute your values to check if it's right.
y = 4x -3
5 = 4(2) - 3
5 = 8 - 3
5 = 5
1 = 4(1) - 3
1 = 4 - 3
1 = 1
