Find the greatest factors of each number. The factors of 40 are 1,2,4,5,8,10,20,40. The factors of 48 are 1,2,3,4,6,8,12,16,24,48. By going through the numbers, you see the greatest common factor is 8. Divide both numbers by 8, and you will get
As the slope of the line increases in value, the vertical distance becomes greater compared to the horizontal distance. Like in stairs or a roof, this results in the stairs and roof becoming steeper. The line becomes more vertical and steeper in its slant.