Question

FAN AND MEDAL

Use slope formula,, to find the slope of a line that passes through the points (–3, 8) and (4, –6).
m = ?
1)-7

2)-2

3)1/2

4)2

Use slope-intercept form, y = mx + b, to find the y-intercept (b) of the line.
b = ?
1)-14

2)-8

3)2

4)7

What is the new equation written in slope-intercept form, y = mx + b?

1)y=(1/2)x-8

2)y=-2x+2

3)y=2x-14

4)y=-2x-8

Answer 1

1)
Use the slope formula
\[\LARGE \frac{y_2-y_1}{x_2-x_1}=slope\]

Answer 2

\(\dfrac{-6-8}{4-(-3)}\)

Answer 3

-14
_____ ?
7

Answer 4

which is simplified to?

Answer 5

divide -14/7 = ?

Answer 6

-2

Answer 7

correct so slope = -2

Answer 8

now we need the y-intercept
so far, the equation is
y = -2x + b
b = y-intercept
we will use the ordered pair (-3,8)
x = -3
y = 8
8 = -2 * -3 + b
8 = 6 + b
8 - 6 = 2
2 = b

Answer 9

I get that thank you

Answer 10

what do I do for the last question though?

Answer 11

if you have slope -2 and y-intercept 2
what do you think goes best?

Answer 12

y=-2x+2

Answer 13

yup

Answer 14

Thank you

Answer 15

yw :)