exam Maths Puzzle Numerical Ability

Write the equation of the line passing through each of the given pairs of points with the indicated slope. Give you results in slope-intercept form, where possible.


(-1,3) an

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exam Other Question
m=2(x+n)


so far i did this:
m=2(x+n)
m=2x+2n
-2n -2n
---------
m-2n=2x
---- ---
2 2

m???= x

can you divide 2n by 2? The road has 10% grade.
a) what is the angle of elevation of the road?
b) if the road is 2km long, how much does it rise?

i got 5.7 for question A, but i couldn't figure out h