Question

Draw the graph of 3x+y=12​

Answer 1

$3x + y = 12 \\ \\ to \: find \: \: the \: \: x \\ \\ set \: \: y \: \: = 0 \\ \\ 3x + 0 = 12 \\ \\ \frac{3x} {\cancel 3} = \frac{12}{ \cancel3} \\ \\ 3x = 12 \\ \\ x = \frac{ \cancel{12} \: \: 4}{ \cancel3} \\ \\ x = 4 \\ \\ the \: \: x \: \: is \: \: (4,0) \\ \\ to \: \: find \: \: the \: \: y \\ \\ set \: \: x = 0 \\ \\ 3(0) + y = 12 \\ \\ 0 + y = 12 \\ \\ y = 12 \\ \\ the \: \: x \: \: is \: \: (0,12) \\ \\ to \: \: graph \: this \: \: line \: \: using \: \: the \: intercepts \: \: first \: graph \: \: the \: \: two \: \: points \: \: (4,0) \: \: and \: \: (0,12) \: \: then \: \: connect \: \: the \: \: two \: \: points \: \: with \: \: a \: \: line...$