# ALGEBRA

posted by .

Solve for y intercepts
7x+y=-2

7x + 2y = 4
--------------
If (3,-5) is a point on the graph for the equation in the form y=mx+7, then m=?

-5=m(3)=7
m=-4
----------------
Identify slope and y - intercept
y=7x+3

4x-y =0
Ans: slope =4 y intercept = 0
-------------------------
Solve for r
(1,r) (3,-5) are two points on a line with slope -4.
Find r
r = (-5 - r)/( 3-1 )
r= 3
-------------
Write the slope intercept for of the equation:
>slope = -5/4 , y intercept = -4
Ans: y = -5/4x - 4

>Through (-1,4), slope = -2
Ans: y = -2x +2

>Through (4,2) and (0,4)
Ans y= 1/2x -4
----------------------
Write the slope intercept form of the equation of the line described:
Through (-1,2), parallel to y = -x - 1

Answer: y = -x + 1
------------

• ALGEBRA -

all look good except this one:

>Through (4,2) and (0,4)
Ans y= 1/2x -4

from given: y = mx + 4
plug in the given point:
2 = 4m + 4
-2 = 4m
m = -1/2

so y = (-1/2)x + 4

notice both (4,2) and (0,4) satisfy my equation.

## Similar Questions

1. ### Algebra II

Please check answers: Use the equation of the exponential function whose graph passes through the points (0,-2) and (2,-50) to find the value of y when x= -2. My answer: -2/25 Solve 64^x<32^x+2 Answer: x<10 Write the equation …
2. ### Algebra 2

Can someone check my answers. Write the following equations in standard form. 1) x^2 - 2x + y^2 + 4y = 11 answer: (x-1)^2 + (y+2)^2 = 16 2) 4x^2 + 24x - y + 34 = 0 answer: y = 4(x-3)^2 + 2 3) The graph of which equation is a circle?

5. ### algebra

I have a few problems I need you to take a look at and tell me if I arrived at the right answer. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and -6 for x I got these as my ordered pairs …
6. ### Algebra

graph the equation x-3=y (where do I plot the points?