here's how we get the equation:
method 1: use the point-slope form and solve for y.
the equation of a line with slope passing through a point is given by
plug in your values and solve for y
method 2: use the slope-intercept form, plug in your knowns and solve for the unknown.
recall that the equation of a line is , where m is the slope and b is the y-intercept
you know m and you know and x value and its corresponding y-value. so plug those in and solve for b. then you can write the equation of the line
can you continue?