The correct answer is X = 13! I don’t know how to explain but I am 100% that is the correct answer!
about 0.83 just solve the equation 5 divided by 6
For f(3)...put 3 as the value of x in f(x)
for x.....put the value of f(x) from the given and equate it with 14..and solve
Pounds will be represented by x and the cost will be represented by y. The equation is Y=3x. For the graph just use substition for x and then calculate the outcome and graph it.