Question

Find the value of y so that the line passing through (6, y) and (7, 5) has a slope of -3

Answer 1

I have just attempted this question successfully.
Just use the equation for a straight line (not y = mx + c, the other one!) and find the equation using the known point.
Then use the other point to find the value of y.
I can take you through it if needed. :)

Answer 2

please do

Answer 3

take me through it

Answer 4

Gladly! :)
We know the gradient of the straight line concerned is -3.
The line passes through the point (7,5).
Use y - y1 = m(x - x1) with y1 as 5 and x1 as 7 to get the straight line equation.
When you have that, substitute the other value of x (i.e. 6) into this equation to get the unknown y-value. The value of y should be 8, unless I have made a mistake somewhere. :)

Answer 5

help mee