exam Maths Puzzle Numerical Ability

How do you solve scatter plots and equations of lines?

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exam Other Question

I am also having a problem with this.
The diameter of the Milky Way disc is approximately 9x10^20 meters. How lon does it take light, travel at 10^16 m/year to travel across the diameter of the Milky Way? James is one and a half times taller than his sister Jill. Together their heigh is 10 ft 5 ins . What are their individual heights?