# math

posted by .

m=6/7(5,-7)
the equation of the line is y=

• math -

Ok, I'm going to try to explain this and let you come to the answer yourself. Feel free to post it so I can check your work and see what you don't understand.

The equation of the line is y = mx + b, where m represents the slope of the line, b is the y intercept (that is, a value on the line where x is equal to 0) and (x,y) are your coordinates.

In order to find the equation of the line, you have to find m or b. In this question, you have to find b given m and a point (x,y).

So you substitute your given values into the equation y = mx + b and solve for b by multiplying m and x and subtracting (or adding depending on the sign) that product from y.

• math -

so is mx the 6/7 or the (5,-7) see this is where it gets confusing for me, I know that The equation of the line is y = mx + b,but how do you find either mx and b

• math -

m and x are different values. x is a point on the graph (naturally, on the x axis) and m is the slope. m = 6/7 so your slope is 6/7 and x is 5. y is -7. (x,y) = (5,-7).

You're given m(6/7), x(5), and y(-7). You have to find b by substituting it into the equation and isolating b.

• math -

Oh, and once you find b you plug in the values of m and b into the equation and leave x and y for there can be any arbitrary point where you can find y for any values of x and vice versa.

• math -

okay but I need to know what the steps are, for example I have 6/7 and (5,-7) what do I do with these I know they are used to find mx and b, maybe you can show me the steps needed this way once I see how it is done perhaps I can use the same method for other problems.

• math -

Given:
m = 6/7
x = 5
y = -7

y = mx + b
-7 = (6/7)(5) + b
*multiply m and x*
-7 = (30/7) + b
*isolate b by subtracting (30/7) from both sides*
-7 - (30/7) = b
*solve for b*
-79/7 = b

• math -

Sam thanks I have done three since this one and I now understand.

## Similar Questions

1. ### Geometry HELP!!!

What happens to the graph of the line y = 3x -2 when the equation is changed to y = 3x +6?
2. ### Math

PLease help me with this: What kind of line is created when you graph the equation x = -5?
3. ### Math 10

1 more question.... how would I make this equation perpendicular?
4. ### math,correction,&help

Write the equation of the line L satisfying the given geometric conditions. L has y-intercept (0,2) and is perpendicular to the line with equation 2x-3y = 6 Equation of perpendicular line is of the form 3x + 2y = K…It passes through …
5. ### math

im learnin about y=mx+b 1.describe the line you think each equation represent Y=x, y=5, x=-3 2. The equation of a line is y=mx+2. determione the value of m when the line passes through each pint D(12.5) s(1.-3) e(-2.6) a(-5.1)

im learnin about y=mx+b 1.describe the line you think each equation represent Y=x, y=5, x=-3 2. The equation of a line is y=mx+2. determione the value of m when the line passes through each point D(12.5) s(1.-3) e(-2.6) a(-5.1)
7. ### calculus

find an equation for the line with the given properties. express the equation in slope-intercept form. containing the pointsP=(-1,1)& Q= (1,-2) What is the equation of the line?
8. ### Math/ Algebra

Find the slope-intercept equation of the line that satisfies the given conditions. Then graph the line. Contains points P=( -1,4);parallel to the line with equation 3x+y =5