Final answer:
To write the equation in point-slope form for the points (-1,-7) and (2,5), calculate the slope (m = 4) and then apply it to the formula y - y1 = m(x - x1), resulting in y + 7 = 4(x + 1).
Step-by-step explanation:
To write the equation of a line in point-slope form using the points (-1,-7) and (2,5), first calculate the slope. The slope is found by taking the difference in y-coordinates divided by the difference in x-coordinates:
m = (y2 - y1) / (x2 - x1)
m = (5 - (-7)) / (2 - (-1))
m = (5 + 7) / (2 + 1)
m = 12 / 3
m = 4
Now that we have the slope, we can write the equation in point-slope form. Assuming we use Point 1 (-1,-7), the point-slope equation is:
y - y1 = m(x - x1)
y - (-7) = 4(x - (-1))
y + 7 = 4(x + 1)
This is the equation in point-slope form, where (x1, y1) is the point (-1, -7) and m is the slope.