Question

@phi
@IMStuck

Answer 1

Can you rule out any of the choices?

Answer 2

the line part of the graph starts at x=1.
one of the choices does not show this, so must be wrong

Answer 3

@phi d doesn't show this...

Answer 4

that is if we are looking at the 2nd equation...

Answer 5

yes, so cross D off the list.

next, we need the equation of the line
can you find its slope by looking at the graph?

Answer 6

no

Answer 7

put your finger on a point on the line. count over then up to get to a new point on the line. How far up (how many "boxes") did you move up? how many over did you go? write down change in y (how far up) divided by how far over (change in x)

can you do that ?

Answer 8

1/5

Answer 9

like this
from the first purple circle to the second, how far up to you go?
how far over?

Answer 10

oh that..1/1

Answer 11

yes, which simplifies to 1
the slope is 1

the equation of a line is
y = mx + b
where m is the slope and b is the y-intercept
so we know m is 1 (we found the slope to be 1)
y = 1x + b
but we usually leave off the 1 (1*x is x)
y = x+b

cross off any choice that does not have a slope of 1

Answer 12

a?

Answer 13

yes. now it's 50/50 for getting the correct answer. either b or c

but to decide which, we have to look at the first line
we have either y=x^3 or y=x^2

I would look at x=-2 and figure out what (-2)^3 is and what (-2)^2 squared is.
then look at the graph to see which number is plotted.

can you do that ?

Answer 14

-8, 4 , not found on graph

Answer 15

what about (-2)^2 ?

Answer 16

yes

Answer 17

the (-2)^3 is -8

that means y=x^3 at x=-2 gives the point (-2,-8)

on the other hand
y= x^2 at x=-2 gives the point (-2, 4)

this one is the graph that is plotted

Answer 18

right, what would be my final answer?