Question

Does this ordered pair represent a function of x? Form of (x,y)

Answer 1

(-8,4), (-3,1), (2,-2), (7,-5)

Answer 2

Plot the points. Then use the formula,
\[y-y_0=\frac{y_1-y_0}{x_1-x_0}(x-x_0)\]
where (x0,y0) and (x1,y1) are points from the list.