Given the linear equation:
This linear equation is in "slope-intercept" form,
its slope is m= -1/4 → this indicates that the line will be decreasing
and its y-intercept is -1, this is the value of y where x=0, you can write it as a coordinate as (0,-1)→ it indicates where the line crosses the y-axis.
Now to plot it using a t-chart you have to determine several values of x and calculate the corresponding y-coordinates. I'll determine the line dor the values of x from -5 to 5:
Now you can plot the line: