You divide 22 by 10 (2.2) and then multiply that by 3 to get 30%, which is 6.6. Then, you divide 2.2 by 2 to get 1.1, which is 5%. After this you just add them up to get the answer as 7.7.
Also, if you have q calculator, you can do it the short way and do 22 × 0.35 = 7.7
hookes law gives the equation F=kx where F is the elastic force and k is the constant and x or small e is extension if we draw a graph you'll see that the graph increases by the same ratio every single time hence giving a straight line show that they are F and x are propotional to a certain limit
1 inch = 2.54 cm
3 inches = 3 * 2.54 = 7.62 cm
Y=2/3 x -(19/3) ( use (x2-x1/)(y2-y1)to find the slope then put it in y=mx+b form and use the last point to solve for b, Remember m would be the slope u solved using the equation)
