Peter R. answered • 02/23/23
Experienced Instructor in Prealgebra, Algebra I and II, SAT/ACT Math.
Make a table for x values (input) and y values (output). For example, if you plug in 0 for x, you'll get y = 4 (that's also the y-intercept). Use some other negative and positive values for x that are easy to work with and are spread out enough so you can draw a straight line through them (it's a linear function in slope-intercept form).
Alternatively, plot the y-intercept at (0,4) and use the negative slope of -2.5 to find other points (down 2.5 units for every 1 unit to the right). The line will decrease left to right for negative slope.
Check by entering the equation into the Desmos Graphing Calculator website.
