Looking at the graph, we can see exactly where the line crosses the y-axis (vertical line). The y-intercept is where the line goes through one point on the y-axis. The purple line goes perfectly through the pointΒ (0,4). Since the line goes through this point and the point is on the y-axis, the point (0,4), is the y-intercept.Β
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Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.
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