X + 7y = 0 2x − 8y = 22
x − y = 3 7x − y = −3
−9 + 5y = −4x −11x = −20 + 9y
y = 4x − 9 y = x − 3
Tell which method you used to solve each system and why you chose that method.

The number of members f(x) in a local swimming club increased by 30% every year over a period of x years. the function below shows the relationship between f(x) and x: f(x) = 10(1.3)xwhich of the following graphs best represents the function? graph of f of x equals 1.3 multiplied by 10 to the power of x graph of exponential function going up from left to right in quadrant 1 through the point 0, 0 and continuing towards infinity graph of f of x equals 10 multiplied by 1.3 to the power of x graph of f of x equals 1.3 to the power of x