Double number lines

Maths

If a double number line starts with 4 on the top and 3 on the bottom, what will be the first number that appears both above and below the lines?

On a double number line, 10 is above the line and 40 is below the line. What is the constant of proportionality?

On a double number line, 4 is above the line and 4.8 is below the line. What is the constant of proportionality?

What is the missing number (indicated by the empty box) on this number line?

What is the constant of proportionality for this number line?

Fill in the gap: the diagram shows a triangle that has been _________ by a scale factor of 3.5.

Fill in the gap: the ratio between the side lengths AB and BC is 2 : ____.

Fill in the gaps: The _______ between the side length DE and EF is also 2 : ___.

Fill in the gap: The constant of _________ between the two triangles is 3.5.