Question

Choose the equation below that represents the line passing through the point (-3, -1) with a slope of 4.
y = 4x - 11
y = 4x + 11
y = 4x + 7
y = 4x - 7

Answer 1

Anyone?

Answer 2

OK a line with slope 4 will always be of the form


y= 4x +b

you know that on THIS line y= -1, when x = -3

so in the equation
-1 = 4(-3) +b

so find the value for b and oyu have your answer..

Answer 3

How do i solve for b?

Answer 4

-1 = 4(-3) +b

first expand the bracket 4 (-3)=?

Answer 5

-12?

Answer 6

ok good

so now the equation is

-1 = -12 + b

what is b?

Answer 7

@MrNood Im not sure to be honest.

Answer 8

Well I can see that you are well beyond doing simple arithmetic - the 'straight line' stuff requires oyu to be able to add and subtract.

Add 12 to each side of the equation.

So for you have not really done anything towards this question.

I am sure that you have enough maths behind you to solve this if you try

Add 12 to each side of the equation:
-1 = -12 + b

Answer 9

-13 = 1 + b?

Answer 10

Oh no wait
its 11

Answer 11

So the answer is either A or B

Answer 12

Im thinking B

Answer 13

OK - so you have the left side correct = 11

have a nother look at the right side (add 12)

Answer 14

-12 would become 0 wouldnt it.

Answer 15

yes

Answer 16

so 11 = b

Answer 17

yes

and y=4x+b

Answer 18

Answer confirmed: y = 4x + 11

Answer 19

Correct?

Answer 20

you know whether it is correct or not - you must have the confidence to submit. In the real world there is not always someone to confirm or 'mark' your work.
Bridges may stand or fall by your calculations, or millions$ may be made or lost

Answer 21

Nice quote.