We can plot the complex number a + bi by following these steps:
1. Determine what the real part is (a), this is the term that is not being multiplied by i, move along the horizontal axis to locate this number
2. move vertically and locate the imaginary part (b)
3.Draw a point in the coordinates (a,b)
In this case, the real part is 7 and the imaginary part is 3, then the plot looks like this: