If a graph is proportional then the line will go through the origin at point (0, 0). If the equation is proportional then it will be in the form of y=kx with no other operations after. The constant of proportionality is another way to say the slope and in your specific equation the slope would be 1/5.
To find the length of the ladder, you need to do Pythagorean theorem. 50^2 + 30^2 = x^2 2500 + 900 = x^2 x^2 =3400 x= square root of 3400 58.31 OR 10 root34
To find the angle: tan theta = opposite/adjacent 50/30 = 5/3 theta = tan inverse of 5/3 = 59.04
