Final answer:
The slope-intercept form is y = mx + b and the point-slope form is y - y1 = m(x - x1).
Step-by-step explanation:
The correct answer is Option A: Slope-intercept: y = mx + b; Point-slope: y - y1 = m(x - x1).
In the slope-intercept form, y = mx + b, 'm' represents the slope, which is the change in y divided by the change in x, and 'b' represents the y-intercept, which is the y-coordinate of the point where the line crosses the y-axis.
In the point-slope form, y - y1 = m(x - x1), 'm' represents the slope, and (x1, y1) represents a point on the line. This form is useful when you know a point on the line and its slope.