Answer:
Step-by-step explanation:
The rate of change, slope, m is
m=(y2-y1)/(x2-x1), we have points (4,5) and (21,39) so
m=(39-5)/(21-4)
m=34/17
m=2
So the rate of change is 2
(-2, 0.5) first
X (-4, 1) → X' (-4*0.5, 1*0.5)
X'(-2, .5)
0.3
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