Answer
$a.)$ $y=-\frac{3}{4}x+\frac{3}{8}$
$b.)$ $y=\frac{4}{3}x+\frac{127}{72}$
Work Step by Step
$a.)$ $(-\frac{2}{3}, \frac{7}{8}), m=-\frac{3}{4}$
$y-\frac{7}{8}=-\frac{3}{4}(x-(-\frac{2}{3}))$
$y=-\frac{3}{4}x + \frac{3}{8}$
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$b.)$ $(-\frac{2}{3}, \frac{7}{8}), m=\frac{4}{3}
$
$y-\frac{7}{8}=\frac{4}{3}(x - (-\frac{2}{3}))$
$y=\frac{4}{3}x+\frac{127}{72}$
