The slope intercept form is y=mx+b The slope formula is m=(y2-y1)/(x2-x1) So; 5-(-7) / 0-4= -3 Then you use one of the points to find b; I’ll use 0 and 5 (the first number is x and the second number is y) 5=(-3)(0)+b 5=0+b 5=b Finally you plug in your two values Y= -3x+5
This question is worded slightly strangely but I believe I understand it. To eliminate x, multiply the second equation by 8, so that it becomes 4x + .8y= 96 Then you can subtract 4x on the top by 4x on the bottom to eliminate it.