Explanation for Question 19 From the Math (No Calc) Section on the 2019 May Sat
Question 19 says the points plotted in the coordinate plane above represent 2 the possible number of wallflowers and cornflowers that someone can buy at the garden 3 store in order to spend exactly $24 total on the two types of flowers, 4 the price of each wallflower is the same and the price of each Quinn 5 flowers, the same, what is the price of one corn flour? 6 So to find the answer to this question, we're going to look at this 7 graph up here. So we know that based 8 on however many flowers are bought, only $24 are being spent. 9 So that's our tool, 24. And we also know that however many 10 flowers are bought equal exactly 24. 11 So if we want to find the price of corn flowers, 12 all we have to do is look at when wallflowers equals zero. 13 So right there on the graph, see what the value is of corn flowers. 14 So 16, and that tells us that you can buy 16 corn flowers, 15 which $24. So we can set that up as an equation. 16 16 C is equal to 24 where C represents the price 17 of a corn flour. And if you divide both sides by 16, 18 you'll find that C is equal to three over two. 19 So that is your final answer.