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This question is an example of compound interest rates. The question asks to find the interest rate of the bank. So first of all we should form an equation relating our initial amount, interest rate, time...

X=2Y=1

This question is a simultaneous equation, this means we substitute one value into the other equation.We are looking for the points where the curves intersect.First I would take x+y=3 and bring the y over ...

We solve this by multiplying the starting value, £4500 , by 1 + {the interest rate expressed as a decimal} , or in this case, 1 + 0.013 . This gives us £4500 x 1.013⁶ and when we type this into...

If you change the coefficient of x, it will stretch or squash the graph in the x direction by the reciprocal of the factor that the coefficient is changed by. If you change the coefficient of f(x), then t...