Determine which of the following equations, when graphed, intersect at the point (4, 0).

Select all that apply.

x - y = 4
-x - y = 4
2x - y = 7
x + y = 4
2x + y = 7
2x + y = -7

Question

Determine which of the following equations, when graphed, intersect at the point (4, 0).

Select all that apply.

x - y = 4
-x - y = 4
2x - y = 7
x + y = 4
2x + y = 7
2x + y = -7

Mercury · Answer

(4,0) means x = 4 and y = 0
so you can just plug them into each equation and see which is true

for example
x - y = 4
becomes
4 - 0 = 4
which is true, so the first choice **does** intersect at (4,0)

repeat for all other choices