Explanation:
The minimum number of points needed to draw a strait line graph is 2. However, 3 is better as one of them forms a check. They should all line up. If not then something is wrong.
Lets determine 2 points
The line will 'cross' the y axis at
x
=
0
and cross the x axis at
y
=
0
So we can determine these points (intercepts) by substitution.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For y-intercept set
x
=
0
giving:
y
=
2
x
.
.
+
2
y
=
(
2
×
0
)
+
2
→
y
=
2
So y-intercept is at the point
(
x
,
y
)
=
(
0
,
2
)
For x-intercept set
y
=
0
giving:
0
=
2
x
+
2
Subtract
2
from both sides
0
−
2
=
2
x
+
2
−
2
−
2
=
2
x
+
0
Divide both sides by
2
−
2
2
=
2
2
×
x
But
−
2
2
=
−
1
and
2
2
=
+
1
−
1
=
x
So the y-intercept is at the point
(
x
,
y
)
=
(
−
1
,
0
)
Answer:
JL = 16x-2
Step-by-step explanation:
From the diagram, we can see that;
JL = JK + KL
Thus;
JL = 9x-5 + 7x + 3
JL = 9x + 7x -5 + 3
JL = 16x -2
Average rate=(change in y)/(change in x)
if f(x)=-x/3
r=( f(2)-f(-2) )/(2--2)
r=(-2/3-2/3)/(2+2)
r=(-4/3)/4
r=-4/12
r=-1/3
For a line, this is always true, since all lines have a constant velocity, the average velocity over any interval is equal to the slope.
Answer:
It's nine 9...........
Step-by-step explanation:
Its nine
