7.4 The slope-intercept form of a line

$\begin{array}{ccc}y=2x+7;& m=& b=\end{array}$

$\begin{array}{ccc}y=-4x+2;& m=& b=\end{array}$

$\begin{array}{ccc}y=-5x-1;& m=& b=\end{array}$

$\begin{array}{ccc}y=\frac{2}{3}x-10;& m=& b=\end{array}$

$\begin{array}{ccc}y=\frac{-5}{8}x+\frac{1}{2};& m=& b=\end{array}$

$\begin{array}{ccc}y=-3x;& m=& b=\end{array}$

At what number does the line cross the $y\text{-axis}$ ? Do you see this number in the equation?

Place your pencil at any point on the line. Move your pencil exactly one unit horizontally to the right. Now, how many units straight up or down must you move your pencil to get back on the line? Do you see this number in the equation?

At what number does the line cross the $y\text{-axis}$ ? Do you see this number in the equation?

Place your pencil at any point on the line. Move your pencil exactly one unit horizontally to the right. Now, how many units straight up or down must you move your pencil to get back on the line? Do you see this number in the equation?