soccerknight8
soccerknight8 soccerknight8
  • 14-12-2018
  • Mathematics
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How do you solve this?? A line has a slope of 2. It passes through the points (1, 2) and (3, y) . What is the value of y?

Respuesta :

gmany
gmany gmany
  • 14-12-2018

The formula of a slope:

[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

We have m = 2 and the points (1, 2) and (3, y). Substitute:

[tex]\dfrac{y-2}{3-1}=2\\\\\dfrac{y-2}{2}=2\qquad\text{multiply both sides by 2}\\\\y-2=4\qquad\text{add 2 to both sides}\\\\\boxed{y=6}[/tex]

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