Respuesta :
y = 9x-27 or y-9=9(x-4)
If the x-intercept is 3, then a coordinate on the graph must be (3, 0). Use those two points to find the slope. Then use point-slope intercept form.
If the x-intercept is 3, then a coordinate on the graph must be (3, 0). Use those two points to find the slope. Then use point-slope intercept form.