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Weare given a graph that relates the number of strawberries to the number of containers in pairs (x, y)

being x the number of containers, and y the number of strawberries.

The points of the graph read:

(3. 57)

(5, 95)

(7, 133)

(9, 171)

and we are asked to find the proportionality between those values.

We then calculate the slope that joins the points, using for example the first two pairs:

slope = (y2 - y1) / (x2 - x1)

in our case:

slope = (95 - 57) / (5 - 3) = 38 / 2 = 19

we check this same type of calculation with another pair of points to see if it holds true as well:

slope = (171 - 133) / (9 - 7) = 38 / 2 = 19

So we can answer that the proportionality is 19 strawberries per container.

User Hisnameisjimmy
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