which is an equation in point-slope form for the given point and slope point (-3 7) slope 4
A y-7=4(x-3)
B y-7=4(x+3)
C 7+7=4(x+3)
Dy+7=4x-12

Question

which is an equation in point-slope form for the given point and slope point (-3 7) slope 4
A y-7=4(x-3)
B y-7=4(x+3)
C 7+7=4(x+3)
Dy+7=4x-12

welshfella · Answer

this form is 

y - y1 = m(x - x1)

where m = slope and (x1,y1) is the given point

anonymous · Answer

oh ok

anonymous · Answer

ok so what is the y-y1

welshfella · Answer

well (x1,y1) = (-3,7)  so x1 = -3 and y1 = 7

welshfella · Answer

you just replace  m , x1 and y1  in the equation by the given values

welshfella · Answer

ill start you off
y - y1 = m(x - x1)
y  - 7  = 

can you do the right side?

welshfella · Answer

m = 4 and x1 = -3

anonymous · Answer

oh ok i think i get it , is the answer y-7=4(x-3)

welshfella · Answer

nearly right  its x + 3 in the panertheses beacuse x1 = -3

y - 7 = 4(x - (-3))

- note the double negative - this simplifies to a '+'

so its 
y - 7 = 4(x + 3)

welshfella · Answer

-(-3) = + 3

ok?

anonymous · Answer

ok thank you for your help