Ab←→ and bc←→ form a right angle at point b. if a = (-3, -1) and
b = (4, 4), what is the equation of bc←→?
x + 3y = 16
2x + y = 12
-7x − 5y = -48
7x − 5y = 48

Gradient of AB =
Since AB and BC forms a right angle, this means that AB and BC are perpendicular.
For perpendicular lines, m2 = -1/m1; where m1 and m2 are the gradient of the two lines.
i.e. m2 = -1/(5/7) = -7/5
Therefore, the equation of BC is given by

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!