Question

Graph the ordered pairs for y = 4x + 2 using x=[-2,1,2]
I don't remember how to do this properly, can someone walk me through it please?

I'm thinking that I need to take (-2,1,2) and plug them into the equation, but what do I do from there?

Answer 1

to plot the eqution you should solve the values of y with each corresponding values of x.

at x = 1

y = 4x + 2

y = 4(1) + 2 = 6

at x = -2

y = 4(-2) + 2

y = -6

at x = 2

y = 4(2) + 2

y = 10

Answer 2

ANSWER

See graph

EXPLANATION

First you need to substitute each x-value in to the function and calculate for the y-values as follows,

When
$x = - 2$

$y = 4( - 2) + 2$

$y = - 8 + 2 = - 6$

This gives us the ordered pairs,

$(-2,-6)$

When
$x = 1$

$y = 4(1) + 2$

$y = 4 + 2 = 6$
We again have the ordered pair,

$(1,6)$

When
$x = 2$

$y = 4(2) + 2$

$y = 8 + 2 = 10$

This also gives the ordered pair,

$(2,10)$

We now plot all the ordered pairs and draw a straight line through the graph as shown in the attachment.