Question

Which pair of points are on the graph of y = -2x + 1?

(2, 7) and (-1, 4)

(3, -5) and (-4, -7)

(6, 8) and (9, 3)

(4, -7) and (-5,11)
Find the midpoint of A(1, 4) and B(3, -6). Place your answer in (x,y) notation with NO spaces.

(-1, -5)

(2,-1)

(4, -2)

(2, -5)

Answer 1

@Directrix

Answer 2

y = -2x + 1
put the x and y values for each point in the above equation and and see if it is true.
For example, the point (2,7). Put x = 2, y = 7 in y = -2x + 1
7 = -2 * 2 + 1
7 = - 4 + 1 = -3. This is NOT true. Therefore, (2,7) is NOT on the line y = -2x + 1.

Answer 3

so is the first option the correct one?

Answer 4

oh nvm

Answer 5

I just showed you above that the point (2,7) is NOT on the line y = -2x + 1. So it is not the first choice. Try each point and see which pair of points lie on y = -2x + 1.

Answer 6

ok

Answer 7

For the second question, the midpoint of \((x_1, y_1)\) and \((x_2, y_2)\) is \(\large (\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2})\)