Point A (-3,5) and point B (1,-15) are to be connected to form a straight line, fing the equation of the line in the form y=mx+c?

First identify your x1, y1 and x2,y2. It is helpful to write this above the two points A and B. To find the gradient the following equation can be used (I will show equation on board),as u can see the X1, Y1 AND x2,y2 we highlighted earlier can be subbed in with respect the their +ive and - ive signs to get the gradient of the line (need be simplify should be -5). Then pick either point A or B. The substitute into the equation of a straight line (I will show this). From here I will simplify (again I will show this and rearrange to find the equation of the line). final answer is y= -5x+10.