## anonymous one year ago The pair of values below is from a direct variation. Find the missing number. (2,5) and (4,y)

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1. geerky42

Direct variation is form $$y = kx$$, where k is some unknown number. So first, we need to find k. We are given known point $$(2,5)$$, so plug that; $$5 = k(2)\quad\Longrightarrow\quad k = \dfrac52$$ Now we know k, we can solve for y from point (4, y); $$y = \dfrac{5}{2}(4)=~?$$

2. anonymous

Y= 10 simple :/

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