Answer:
The straight, diagonal line represent a tangent line
Explanation:
As the shown straight diagonal line represented in the figure just goes by touching a part or points on the curve, this line will be termed as tangent line. A secant line is the one which joins two points on the curve in the inward side. But in this case, the line is touching the outward points of the curve. Also the line is sliding through the curve in outward points. So this kind of line touching some points on any curve is termed as tangential line or slope of that curve.
