Question

What is the y-intercept of the line 5x + 7y + 9 = 0?​

Answer 1

Answer:

Using the slope-intercept form, the slope is −57 . The equation of a perpendicular line to y=−5x7+97 y = - 5 x 7 + 9 7 must have a slope that is the negative reciprocal of the original slope. Simplify the result.