Question

4,5,7 please help ... didn't understand any of it ...

Answer 1

#4
(-2,4)(-3,5)
slope = (5-4)/(-3+2) = 1/-1 = -1

point slope form

y-y1 = m(x - x1)
y - 4 = -(x + 2)

#5
y intercept of 3 , y = 3 or (0,3)
x intercept of -2 , x = - 2 or (-2,0)

slope = -3/2

slope intercept form
y = mx + b
y = -3/2x + 3 

#6
point slope form
y = 1/2x - 4 passing thru(5,2)
y - 2 = 1/2 (x - 5)

# 7

y = 1/2x - 4
perpendicular slope = -2
passing thru (-1,4)

using point slope form
y-4 = -2(x+1)