Question

9. Write the slope-intercept equation of the line perpendicular to y = 5/2 x - 2, which passes though the point (0, 2).(Points : 1)
y = 5x + 2
y = -2/5x + 2
y = 2x + 5
y = 1/2x + 5


10. Write the slope-intercept form of the equation parallel to y = 7x + 2, which passes through the point (1, -3).(Points : 1)
y = 7x - 10
y = -1/7 x + 2
y = 7x - 3
y = -7x + 10

Answer 1

slope of line perpendicular to line with slope m is -1/m

Answer 2

hence for clearly for
9) y = -2/5x + 2
10) y = 7x - 10 (for parallel slopes are equal)