Mathematics

Problem

Try to solve the following simultaneous equations graphically. State the number of solutions in each case. a. a

\begin{cases} y = -2x + 5 \\ y = -2x - 1 \end{cases}

b. b

\begin{cases} x - \frac{1}{4}y = -2 \\ y = 4x + 8 \end{cases}

c. c

\begin{cases} 3x + 4y = -24 \\ 3x + 4y = -12 \end{cases}