Question 6 from PSAT / NMSQT Paper Practice Test 2, Math Section 3

This is the answer to question 6 from the PSAT / NMSQT Paper Practice 2, Math Section 3. The question is "The equation y = 36 + 18x models the relationship between the height y, in inches, of a typical golden delicious apple tree and the number of years, x, after it was planted. If the equation is graphed in the xy-plane, what is indicated by the y-intercept of the graph?" This math problem includes lines in slope-intercept form, word problems, and interpreting graphs. Calculators are NOT allowed on this section. This practice test is provided for free by the College Board. This video will show you how to do this problem and the logic behind it.

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