sat suite question viewer
The graph shown gives the estimated value, in dollars, of a tablet as a function of the number of months since it was purchased. What is the best interpretation of the y-intercept of the graph in this context?
Explanation
Choice A is correct. It's given that the graph shown gives the estimated value , in dollars, of a tablet as a function of the number of months since it was purchased, . The y-intercept of a graph is the point at which the graph intersects the y-axis, or when is . The graph shown intersects the y-axis at the point . It follows that months after the tablet was purchased, or when the tablet was purchased, the estimated value of the tablet was dollars. Therefore, the best interpretation of the y-intercept is that the estimated value of the tablet was when it was purchased.
Choice B is incorrect. The estimated value of the tablet months after it was purchased was , not .
Choice C is incorrect. The estimated value of the tablet had decreased by , or , not , in the months after it was purchased.
Choice D is incorrect and may result from conceptual errors.