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In the diagram is the graph of linear equation y = x + 4 containing two points, P(–3, 1) and Q(4, 8).
Point R(x, 0), located on the x-axis, is such that it can move between points S(–3, 0) and T(4, 0). Define y as the area of △PRQ. Answer the following:
⒜* Express y in terms of x.
⒝ Determine the range of values of y.
⒞ Given y = 10, determine the coordinates of point R.
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