Final answer:
To determine when to use the slope formula or both the slope formula and point-slope formula, you need to understand the purpose and application of each.
Step-by-step explanation:
To determine when to use the slope formula or both the slope formula and point-slope formula, you need to understand the purpose and application of each.
The slope formula is used to find the slope of a straight line between two given points. It calculates the ratio of the vertical change (rise) to the horizontal change (run).
The point-slope formula is used to find the equation of a straight line when the slope and one point on the line are known. This formula allows you to directly plug in the slope and coordinates of a point to find the equation of the line.
Therefore, if you are given two points and asked to find the slope, you would use the slope formula. If you are given the slope and a point, and asked to find the equation of the line, you would use both the slope formula and point-slope formula.