Step-by-step explanation:
The point-slope form of an equation of a line:
![y-y_1=m(x-x_1)](https://tex.z-dn.net/?f=y-y_1%3Dm%28x-x_1%29)
m - slope
(x₁, y₁) - given point
![\bullet\ (2,\ 7),\ m=-4\\\\y-7=-4(x-2)\\\\\bullet(-6,\ -2),\ m=3\\\\y-(-2)=3(x-(-6))\to y+2=3(x+6)\\\\\bullet(12,\ 5),\ m=-3\\\\y-5=-3(x-12)\\\\\bullet(7,\ -6),\ m=\dfrac{1}{2}\\\\y-(-6)=\dfrac{1}{2}(x-7)\to y+6=\dfrac{1}{2}(x-7)\\\\\bullet(4,\ -5),\ m=6\\\\y-(-5)=6(x-4)\to y=y+5=6(x-4)\\\\\bullet(-8,\ 2),\ m=-\dfrac{3}{4}\\\\y-2=-\dfrac{3}{4}(x-(-8))\to y-2=-\dfrac{3}{4}(x+8)](https://tex.z-dn.net/?f=%5Cbullet%5C%20%282%2C%5C%207%29%2C%5C%20m%3D-4%5C%5C%5C%5Cy-7%3D-4%28x-2%29%5C%5C%5C%5C%5Cbullet%28-6%2C%5C%20-2%29%2C%5C%20m%3D3%5C%5C%5C%5Cy-%28-2%29%3D3%28x-%28-6%29%29%5Cto%20y%2B2%3D3%28x%2B6%29%5C%5C%5C%5C%5Cbullet%2812%2C%5C%205%29%2C%5C%20m%3D-3%5C%5C%5C%5Cy-5%3D-3%28x-12%29%5C%5C%5C%5C%5Cbullet%287%2C%5C%20-6%29%2C%5C%20m%3D%5Cdfrac%7B1%7D%7B2%7D%5C%5C%5C%5Cy-%28-6%29%3D%5Cdfrac%7B1%7D%7B2%7D%28x-7%29%5Cto%20y%2B6%3D%5Cdfrac%7B1%7D%7B2%7D%28x-7%29%5C%5C%5C%5C%5Cbullet%284%2C%5C%20-5%29%2C%5C%20m%3D6%5C%5C%5C%5Cy-%28-5%29%3D6%28x-4%29%5Cto%20y%3Dy%2B5%3D6%28x-4%29%5C%5C%5C%5C%5Cbullet%28-8%2C%5C%202%29%2C%5C%20m%3D-%5Cdfrac%7B3%7D%7B4%7D%5C%5C%5C%5Cy-2%3D-%5Cdfrac%7B3%7D%7B4%7D%28x-%28-8%29%29%5Cto%20y-2%3D-%5Cdfrac%7B3%7D%7B4%7D%28x%2B8%29)
The equation is y=mx+c where m is the gradient and c is the y-intercept
Answer:
n = 2b + 4
Step-by-step explanation:
4 years older = +4
2 times his brother = 2b
n= 2b+4
Answer:
44, 46, and 48
Step-by-step explanation:
add them and you should get 138.