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ACT Science Practice Questions - ACT Science Section (Enhanced ACT 2025) Exam

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Figure 1 shows a scatterplot of plant height (cm) versus amount of fertilizer applied (g/m²) for 20 tomato plants. The data show a positive linear trend from (0, 12) to (100, 62), with the equation of the best-fit line approximately: Height = 0.5 × (Fertilizer) + 12. Based on Figure 1, what is the predicted height of a tomato plant that receives 80 g/m² of fertilizer?
Correct Answer:
52 cm

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