Atractor has a rear wheel with a 2-meter diameter and a front wheel with a 1-meter diameter. two points on the outer rims of the tires, a and b, are labeled in the picture. the height above the ground, in meters, of point a is a function of the distance, in meters, x, that the tractor moves forward. the graph of this function is shown. which function represents the height above the ground, in meters, of point b? a b(x)=0.5+cosx b b(x)=0.5+0.5cos(x2) c b(x)=0.5+0.5cosx d b(x)=0.5+0.5cos(2x)

do you have the measurements?

the answer is d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

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