How to do questions a and b?

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1 Answer
Jim G.
Feb 2, 2018

#y=2.25x" and "24.622" Km"#

Explanation:

#"since O is the origin the equation will be in the form"#

#•color(white)(x)y=mx#

#"where m is the slope"#

#m=(Deltay)/(Deltax)=22.5/10=22.5/10=2.25#

#rArry=2.25x" is the equation of line"#

#OA=sqrt(10^2+22.5^2)larrcolor(blue)"Pythagoras' theorem"#

#color(white)(OA)~~24.6221.." Km#

#color(white)(OA)=24.622" Km to nearest metre"#

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