Answer:
gradient=4 y intersept: B(0;-2) Point (1;12) doesn't lie on y=3x+8
(-2,10) lies on the line y=14+2x
Step-by-step explanation:
2y=8x+1 => divide both sides by 2=> y=4x+1/2 => gradient = 4
4y+8x= -8 => 4y= -8-8x => y=-2-2x . -2 - I indicated this number with the bold ( this ratio is the y coordinate of y- intersept. x coordinate=0
So the y-intersept is (0;-2)
We have a point (1;12) 1 is x coordinate of the point and 12 is y coordinate.
Put 1 and 12 instead x and y in the given formula. If we get the correct expression => the point lies on the line, if the expression is false=> doesn't lie on the line.
Now lets check !
12=3*1+8
12= 11 - false => the point (1;12) doesn't lie on y=3x+8
Similarly proceed: 10=14+2*(2)
10=14-4
10=10 - right ! Point (-2;10) lies on y=14+2x
