Question #21901

Decide which of the two points lies on the graph of the line.

2x + y = 10

a (4, 3) b (-4, 18)

2x + y = 10

a (4, 3) b (-4, 18)

Expert's answer

2x + y = 10

a (4, 3) b (-4, 18)

if point (x1, y1) lie on the graph 2x + y = 10 then

2x1+y1=10

1) a (4, 3)

2*4 + 3 = 11 - not equal10

point a does not lies on the line

2) b (-4, 18)

2*4 - 18 = 10 equal 10

point b lies on the line

a (4, 3) b (-4, 18)

if point (x1, y1) lie on the graph 2x + y = 10 then

2x1+y1=10

1) a (4, 3)

2*4 + 3 = 11 - not equal10

point a does not lies on the line

2) b (-4, 18)

2*4 - 18 = 10 equal 10

point b lies on the line

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