# math

posted by .

If (8, 7) are the coordinates of a point on a line that has slope –3, what is the y-coordinate of the point on the line at which x=1

• math -

first find the equation:

with slope of -3 and the point(8,7) on it, using
y = mx + b
7 = -3(8) + b
31

y = -3x + 31
when x = 1
y = -3(1) + 31 = 28

## Similar Questions

1. ### Algebra

Given a line containing the points(1,4), (2,7) and (3,10) determine that slope-intercept form of the equation, provide one additional point on this line, and graph the funtion. Start by putting the first point into point-slope form: …
2. ### math,question

okay i really don't understand this problem. It says: Prove the point-slope equation property which is : Point-slope equation(an nonvertical line with slope m and containing a point (X1,Y1) has the point-slope equation of y-y1=m(x-x1). …
3. ### geometry

If the slope of a line is 5/3 and a point on the line is (57,12) using the given point and the slope find the coordinates of the lattice point on the line?
4. ### geometry

On a number line, point A has coordinate 5, and point D is on the line such that AD = 8. What are two possible coordinates of point D?
5. ### math

graph the line with slope 1/2 passing through the point(-5,-2) find the slope of the line 5x+5y=3 write answer in simplest from consider the line 2x-4y=4 what is the slope of a line perpendicular to this line. what jis the slope of …
6. ### Math! Please check!

Okay, so this one is going to be a bit difficult to answer as I cannot post my number line, so you may just have to visualize it, or draw it out on paper. If HI = GM at what coordinates could point M lie?
7. ### algebra or algebra1

A line with slope 3 passes through the point (0; 10). What is the y-coordinate of the point on the line with x-coordinate 2?
8. ### math

A right triangle is drawn on a coordinate plane. Its base is the line segment between (2, 2) and (9, 2). The hypotenuse is a line segment that begins at (2, 2) and has slope 1.25. Find the coordinates of the third point.
9. ### coordinate geometry

Find the equation of the locus of a moving point such that the slope of the line joining the point to A(1,3) is three times the slope of the line joining the point to B(3,1).
10. ### Pure Math Coordinate Geometry

The Point O Is(0,0) and Point B is(6,9).Point A lies on the line OB.The ratio of OA:AB=2:1.Find the coordinates of Point A. (Method Needed Mostly)thanks....

More Similar Questions