Question

Points A and B lie on the graph of the equation y = 7x.

What are the y-coordinates for each point?

Point A: (−2, ) Point B: (4, )

Help Meh

Answer 1

y=7x

A:
x=-2,

y = 7(-2)
y = -14, so the point is (-2,-14)

B:
x=4,

y = 7(4)
y = 28, so the point is (4,28)

Answer 2

$The\ coordinates\ any\ points:P(x;\ y)\\----------------\\y=7x\\\\A(\underbrace{-2}_x};y)\\\\put\ x=-2\ to\ equation:\\\\y=7\times(-2)=-14\\\\therefore:\boxed{A(-2;-14)}\\\\B(\underbrace{4}_x;\ y)\\\\put\ x=4\ to\ equation:\\\\y=7\times4=28\\\\therefore:\boxed{B(4;\ 28)}$