Question

determine a funçao do 1grauque contem os pontos (1,-3)e (6,7)

Answer 1

$\left \{ {{a+b=-3} \atop {6a+b=7}} \right. \\ \\ 5a =10 \\ a= \frac{10}{5} = 2 \\ \\ 2 +b=-3 \\ b= -3-2 = -5 \\ \\ f(x)=2x-5$