200 points if you help me? 24 hours is equal to one of the Earth

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

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