write an equation for the line with a slope 3 going through the point (1, -2).?

Question

only answer this if you know it! and please show me how you got the answer.

Answer 1

when slope and 1 point is given..... eqn can be formed by

(y-y1)=m(x-x1)

where m=slope=(3)
y1=y-intercept of point=(-2)
x1=x-intercept of point=(1)

putting values in eqn we get
(y+2)=3(x-1)
which yields to 3x-y=5..........equation for line

Answer 2

Start with the definition equation
y = m x + b

m is the slope. To solve for b, we can use the point information. Substitute the specific y and x of the point:

-2 = 3 (1) + b

Add -3 to each side, and
-5 =b

So y = 3 x - 5

Answer 3

y= 3x - 5 , start at the point (1, -2) and you know the slope is change in y divided by change in x. If it is 3 then that means you go up 3 units on the y axis for every increase in 1 on the x axis. Therefore if you go to the left the y-intercept would be (0, -5) and the slope is 3, so the equation is y = 3x - 5.

Answer 4

1+2=3-X

Answer 5

*Make sure you know the slope-intercept formula:

y = mx + b

First: take the slope (3), the point (1, -2) and place them into the slope-intercept formula:

-2 = 3(1) + b
-2 = 3 + b

Second: find the y-intercept represented as the variable "b" by keeping it on one side by itself: subtract 3 from both sides:

-2 - 3 = 3 - 3 + b
-5 = b; b = -5

Third: take the y-intercept (-5), the slope (3) and place them into the slope-intercept form as an equation:

y = 3x - 5

Answer 6

Use the formula y = mx + b.

The slope, m, is 3. y = 3x + b.

Plug in the x- and y-coordinates to the equation. -2 = 3(1) + b.

-2 = 3 + b
b = -5

The equation is now y = 3x - 5 :)

Answer 7

y= mx + c
m = slope = 3
y = 3x + c ..... as this goes thru (1,-2), this point should satisfy this equation.
So -2 = 3 + c ..... c = -5
So, the eqn of the line is y = 3x - 5

Answer 8

To write this into an equation, you must understand what makes up the equation.
To put it into y-intercept form, you use the equation y=mx+b
m=slope
x=x
b=y-intercept
In this problem the slope is 3, put that where m is
y=3x+b
To find the y-intercept, you look at the pair of coordinates, the y value (-2) is the y-intercept. Put this number where b is in the equation.
So your answer is y=3x-2

Answer 9

Given factors (x?,y?) and (x?,y?) on a line, slope m = (y?-y?) / (x?-x?) For (-a million,3) and (0,-2), slope m = (-2-3) / (0- -a million) = -5/a million = -5 y = -5x + b -2 = -5(0) + b b = -2 y = -5x - 2

Answer 10

y=mx+b
m=3
y=3x+b
-2=3(1)+b
-2=3+b
-5=b

equation y=3x-5