Which number line shows the solution to the inequality 4x + 5 9?
-4-2 0 2 4
TH
-4-2 0 2 4
1-4-2 0 2 4
D
-4-2 0 2 4

1. use the equation y -y1 = m(x-x1)
2. (-6,-4) is x1,y1 and (4,-6) is x2,y2
3. y-(-4) = m(x-(-6)
m is the gradient, 10/10, which is 1. make two negatives into a positive.
4. y+4 = x+6

therefore the equation of the lines is y = x+2

substitute the points back into the equation to double check.