Question

Find the equation of the line through the points (1,7) and (3, -1).

Answer 1

y = -4x + 11

Answer 2

Can you explain your work? I got something different.

Answer 3

\[\underline{Slope}\]\[=\large{\frac{y_2-y_1}{x_2-x_1}}\]

Answer 4

\[= \frac{-1-7}{3-1} = \frac{-8}{2}=-4\]

Answer 5

m = -1-7/3-1
= -4

y = mx + b
7 = -4(1) + b
7 = - 4 + b
b = 11

y = -4x + 11

Answer 6

now
\[y-y_1=m(x-x_1)\]\[y-7=-4(x-1)\]

Answer 7

\[y-7=-4x+4\]\[y=-4x+11\]

Answer 8

Thank you both!

Answer 9

\[\Huge{{your}} \Huge{\underline{Welcome}}\]

Answer 10

:D