Question

Write the equation of a line in slope intercept form that passes through the points (-2, 7) and (3, 12). Do not use spaces and enter fractions as improper reduced fractions when needed.
is the right answer y=x-9

Answer 1

no
the sign is wrong. check your working

Answer 2

so it is y=x+9

Answer 3

yes

Answer 4

\[3=12+b 3-12=12-12+b\] wouldn't 3-12 equal -9

Answer 5

the answer is y = x + c
subst in (-2,7)
7 = -2 + c
c = 9

Answer 6

thus y = x + 9

Answer 7

if you use the other point,
subst in (3,12)
12 = 3 + c
c = 9
thus it is still y = x + 9

Answer 8

1) Find your slope
m= (y2-y1/x2-x1)
= (12-7/3-(-2))
= 1
2) sub in one of your points to the equation y=mx+b, solve for b
12 = 1(3)+b
12-3=b
9= b

3) therefore, your equation is y=x+9

Answer 9

is that the slop intercept formula?

Answer 10

ow ok

Answer 11

Write an equation of a line in slope intercept form that is parallel to y = 3x+6 and passes through the point (-10, 2.5). so the answer for this q would be y=3x-32.5

Answer 12

yep that's correct the answer is y=3x-32.5 :)

Answer 13

are you sure cause i have a vhs teacher saying that it is wrong

Answer 14

its wrong

Answer 15

the slope is the same since its parallel. thats 3
so the equation of that line is: y = 3x+c

Answer 16

substitute in the point (-10,2.5)
2.5=3(-10) + c

Answer 17

c = 32.5

Answer 18

its y = 3x + 32.5

Answer 19

irkiz is correct, sorry!

Answer 20

were did you get that formula cause it does not say that in my lesson do you use that formula for slope intercept form and point slope form?

Answer 21

equation of a straight line in general is
y = mx + c
m is the slope/gradient. c is the y-intercept

Answer 22

if you have the gradient and any point on that line, just substitute in the values and you get c

Answer 23

it has it as y=mx+b

Answer 24

c or b doesnt matter.... its just an arbitary alphabet

Answer 25

Write an equation of a line in slope intercept form that is perpendicular to y = -4x -2 and passes through the point (-16, -11). Do not use spaces and enter fractions as improper reduced fractions when needed. the answer is y=4x+53 correct?

Answer 26

yes

Answer 27

eh no

Answer 28

hold on let me check i said it without checking

Answer 29

yup its right

Answer 30

thank you

Answer 31

y=-4/3+5 and the points that i am using are (0,-6) so you do y-o=3/4(x-0) and you get y=3/4x right

Answer 32

no that is wrong it is y-0=3/4(x--6) and you get y=3/4x+5.25