Answer:
y = -2x
Step-by-step explanation:
The equation of the line is y = -2x. Use the form y = mx + b and substitution to find your answer.
The problem already gave you the slope, and m represents the slope.
y = -2x + b
The problem also gave you one point. Substitute the x and y values of that point into the equation.
Point: (2, -4)
-4 = -4 + b
b = 0
Using basic algebra, we found that there is no b value. b equals 0. So all we have to write is y = -2x.
Answer:
y = - 2x
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Here m = - 2, thus
y = - 2x + c ← is the partial equation
To find c substitute (2, - 4) into the partial equation
- 4 = - 4 + c ⇒ c = - 4 + 4 = 0
y = - 2x ← equation of line
