Ascend vs. descent

Which function is growing?

a) y = 2-x
b) y = 20
c) y = (x + 2). (-5)
d) y = x-2

Result

r = (Correct answer is: d) Wrong answer

Solution:

y=kx+q  k1=−1 k2=0 k3=−5 k4=1  k>0  r=d

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