If Jenn is producing at point A, she generates 20 pages and 10 images. If she wants to increase her image output by 20 images each week, she can move to point B where she produces 10 pages and 30 images. For each page Jenn does not produce, she is able to produce 2 more images. For Jenn, the opportunity cost of a page is two images, so her PPF has a slope of -2.
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