Along the horizontal axis, we represent the class intervals of IQ on some suitable scale.
The corresponding frequencies of the number of students are represented along the Y-axis on a suitable scale.
The given intervals start with 60 - 70. It means that there is some break (≈) indicated near the origin to signify the graph is drawn with a scale beginning at 60.
Now, we draw rectangles with class intervals as the bases and the corresponding frequencies as heights.
A histogram of the given distribution is given below.