exam Maths Puzzle Numerical Ability

i totally blow at graphs....

graph each function
f(x)={x-1 if -3<x<0
{3x-1 if x>or=0

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exam Other Question

At sea, the distance,d (in miles), that you can see to the horizion depends on your height. If your eyes are,h, feet above sea level, then the distance you can see to the horizon x2+5x-14 divided by x3+10x+21X