Answer:
[tex]y = -8x + 79\:\:and\or\:\:y - 7 = -8(x - 9)[/tex]
Step-by-step explanation:
According to the Point-Slope Formula, [tex]y - y_1 = m(x - x_1)[/tex], all the negative symbols give the OPPOSITE terms of what they really are, so be EXTREMELY CAREFUL inserting the coordinates into the formula with their CORRECT SIGNS:
[tex]y - 7 = -8(x - 9)[/tex] >> Point-Slope Form
y - 7 = −8x + 72
+ 7 + 7
____________
[tex]y = -8x + 79[/tex] >> Slope-Intercept Form
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