(d,4) the d represents X and 4 represents y. So just plug in 4 for y.
you get: now solve for d!
3d+4=10 (-4 from both sides)=> 3d=6 (divide by 3 both sides)=> d=2
11. 2y-7x=4 to find the slope, you want the formula to look like this: y=mx+b
so we need to fix the formula to look like that.
2y-7x=4 (move 7x to other side) => 2y=7x+4 (now divide by 2 both sides) => y=(7/2)x+2
so slope is 7/2 and y-intercept is 2!
12. So to find the x-intercept is when y=0. so just plug in y=0 to the equation.
4x+6(0)=-12 => 4x+0=-12 => 4x=-12 (divide by 4 both sides)=> x=-3 <this is the x intercept. (-3,0)
to find y intercept you make the formula look like y=mx+b and find "b".
4x+6y=-12 (move the 4x to other side)=> 6y=-4x-12 (divide by 6)=> y=(-4/6)x-(12/6) so you get the y intercept to be -2.
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