Yongqing H. | Steve: Experienced tutor in college math and physicsSteve: Experienced tutor in college math...
First, the problem tells us that the slope is 2, so from the equation
y=m x + b
we know m=2. We have one more info that is not exploited, which we shall use to find "b":
-6 = 2 * (3) + b = 6 + b.
b = -12. And all in all
y = 2 x - 12. Note the "-" sign to signify that "b" is negative.
George T. | George T.--"It's All About Math!"George T.--"It's All About Math!"
The standard equation for a straight line where the slope (m) is provided and a point on the line (x0, y0) is specified is (y-y0)=m(x-x0). Substituting for m, x0, and y0 with the information provided, you get:
Simplifying the above: y+6=2x-6
Ralph L. | Algebra I, II, Visual Basic, Beginning C++ tutorAlgebra I, II, Visual Basic, Beginning C...