Question

a equaçao da reta q passa pelos pontos A(3,1) b(-2,0)

Answer 1

y = ax + b
ax + b = y

3a+b = 1
-2a+b = 0 .(-1)

3a+b = 1
2a-b = 0
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5a = 1
a = 1/5
3a+b = 1
3.1/5 + b = 1
3/5 + b = 1
b = 1 - 3/5
b = 5/5 - 3/5
b = 2/5
y = 1/5 x + 2/5
y = x/5 + 2/5
y = (x+2)/5