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Evgesh-ka [11]
3 years ago
14

What is the equation of the line that has a slope of m = 2 and passes through the point (-5, -6)?

Mathematics
1 answer:
Alenkinab [10]3 years ago
4 0

Answer:

y=2x+4

Step-by-step explanation:

You can solve this two ways: insert the values into point-slope form and simplify to solve for y, converting it to slope-intercept form, <em>or</em><em> </em>insert the values into slope-intercept form, solve for b, and insert b. We'll do both :)

<em><u>Point-slope form:</u></em>

y-y_{1}=m(x-x_{1})

Where:

  • m is the slope
  • x_{1} and y_{1} are corresponding coordinate points (x,y)

Insert the given values:

m=2\\\\(-5_{x_{1}},-6_{y_{1}})\\\\y-(-6)=2(x-(-5))\\\\y+6=2(x+5)

Solve for y. Expand the right sie using the distributive property:

y+6=2(x)+2(5)\\\\y+6=2x+10

Isolate the variable. Subtract 6 from both sides, canceling out the 6 on the left:

y+6-6=2x+10-6\\\\y=2x+4

<em>OR</em>

<em></em>

<em><u>Slope-intercept form:</u></em>

y=mx+b

Where:

  • m is the slope
  • b is the y-intercept
  • x and y are corresponding coordinate points (x,y)

Insert the given values:

m=2\\\\(-5_{x},-6_{y})\\\\-6=2(-5)+b

Simplify the multiplication:

-6=-10+b

Solve for b. Add 10 to both sides, canceling out the 10 on the right:

-6+10=-10+10+b\\\\4=b

The value of b is 4. Insert the appropriate information into the equation. When using slope-intercept form, you don't plug in the coordinate points:

y=2x+4

:Done

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