Consider the following system of equations and its graph:
{
−
2
x
+
y
=
−
7
4
x
+
3
y
=
9
\displaystyle {\left\lbrace\begin{array}{ccc} -{2}{x}+{y}&=&-{7}\\{4}{x}+{3}{y}&=&{9}\end{array}\right.}
{
−
2
x
+
y
4
x
+
3
y
=
=
−
7
9
2
4
6
-2
-4
-6
2
4
6
8
-2
-4
-6
-8
A
B
A) What is the solution of the system?
Answer:
(
x
,
y
)
=
\displaystyle {\left({x},{y}\right)}=
(
x
,
y
)
=
(
,
)
B) In the boxes below, enter either the letter A or B to match the equation to the graph shown.
-
a
b
−
2
x
+
y
=
−
7
\displaystyle -{2}{x}+{y}=-{7}
−
2
x
+
y
=
−
7
-
a
b
4
x
+
3
y
=
9
\displaystyle {4}{x}+{3}{y}={9}
4
x
+
3
y
=
9
Graph A
Graph B
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