ACT 2017 December(A10) Math Question 20 Explanation - ACT Helper

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2017 December(A10) Math Question 20
Perimeter, Area, Volume
- General Sequences
Choice F
$L e t t h e l i n e a r f u n c t i o n b e y = k x + b$ $\Rightarrow 2 = 5 k + b$ $6 = 15 k + b$ $\Rightarrow k = \frac{2}{5}, b = 0$ $y = \frac{2}{5} x$
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