Find the equation of the linear function represented by the table below in slope- intercept form.
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Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup