The first thing we can do to figure this out is realize that a fraction is basically a division of two numbers. If we read what says, it reads, "13 divided by 6"
Now that we know what this fraction is saying, we can work it out. So, we divide 13 by 6.
13 ÷ 6 = 2.16666666667
This equation is stating how many times 6 goes into 13.
To begin, you are given two point that this function would intercept: (0,3) where the 0 is the original year (2000) and 3 is the amount of million cars sold. The next point would be (6,2.5) Where the 6 is the 6 years later and the 2.5 is the 2.5 million cars sold. Since we have 2 points, we can work out the gradient by finding the rate of change in y and dividing by the rate of change in x:
We then substitute in the points:
Because we started on the y-intercept of (0,3), we already have our intercept value of 3. If we did not start with the y-intercept given, we could substitute in a point to solve for it: