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<p>Okay on this one you can either use a graphing calculator and trace the points or actually solve it. x=y^2-4 is basically a sideways parabola. It has to intersect at points with line l. Knowing it’s a sideways parabola opening to the right, the larger the values of X, the larger Y becomes. That means that for (0,p), you’ll want a smaller value than (5,t). Plugging in 0 for X in x=y^2-4, you’ll get -2 or 2, but -2 is smaller. Putting in 5 for X, you’ll get 3 or -3, but you want 3 since it’s larger.</p>
<p>Line l and the other equation intersect at points (0,-2) and (5,3), which gives you the slope of 1.</p>