Question

Write the equation of a line in slope-intercept form passing through (2, 7) and (-2, 9).

Answer 1

y=1/2-8

y=1/2+8

y=-1/2-8

y=-1/2+8

Answer 2

first draw a graph

Answer 3

Find the slope of the line.

Answer 4

is it c

Answer 5

No. Where'd you get c from?

Answer 6

like option c?

Answer 7

But why C?

Answer 8

Why not A? or B? or D?

Answer 9

becasue th ats th eanswer i got ?

Answer 10

Show work?

Answer 11

y= -1/2x+8

Answer 12

@sammy12 , that's incorrect. The answer is C

Answer 13

so im right

Answer 14

Actually, you don't know who's right.

Answer 15

Wanna listen to my explanation?

Answer 16

@needhomeworkhelp

Answer 17

yeeess!!!!

Answer 18

Ok.
Slope=rise/run

Answer 19

Since we have two points we search for the slope first.

Answer 20

(2, 7) and (-2, 9).
we have
rise (9-7) rise=2
run (-2-2) run=-4
slope=rise/run=2/(-4)=\(-\frac{1}{2}\)
So, we know the slope is 1/2.
What now?

Answer 21

We have a linear equation y=mx+b
slope is m
We don't know b. But, we know a 2 points, and the slope of the line. Just pick a point (x,y) and put it in there, as well as the slope m, to find b.

Answer 22

\(\large y=-\frac{1}{2}x+b\) Let's use the point (2,7)
7=-1+b
b=8
So, the answer was actually \(\Huge B.\)

Answer 23

*the answer was \(\Huge D\), not \(\large B\).