Question
Question 8 of 10 Which is not an equation of the line going through (6,7) and (2,-1) 7 A. y=2x-5 B. y+1=2(x-2) C y-1=2(x+2) D y-7=2(x-6)
Solution
4.6
(284 Votos)
Beatriz Maria
Profissional · Tutor por 6 anos
Resposta
To determine which equation is not the equation of the line going through the points
and
, we need to find the slope of the line and then use the point-slope form of a linear equation to find the equation of the line.Step 1: Find the slope of the line.The slope of a line passing through two points
and
is given by the formula:
Substituting the given points
and
into the formula, we get:
Step 2: Use the point-slope form of a linear equation.The point-slope form of a linear equation is given by:
Using the point
and the slope
, we can write the equation as:
Step 3: Simplify the equation.To simplify the equation, we can distribute the 2 on the right side:
Adding 7 to both sides, we get:
Therefore, the equation of the line going through the points
and
is
.Step 4: Compare the given options with the equation we found.A.
- This matches our equation, so it is correct.B.
- Let's simplify this equation:
Subtracting 1 from both sides:
This also matches our equation, so it is correct.C.
- Let's simplify this equation:
Adding 1 to both sides:
This does not match our equation, so it is incorrect.D.
- This matches our equation, so it is correct.Therefore, the equation that is not the equation of the line going through the points
and
is option C:
.