Point slope: y - y1 = m(x - x1), m is the slope
first picture
points (-4,-1) and (3,-3)
the slope between these points is
slope = (-3 - 1)/( 3 - (-4) ) = -2/7
if (x1, y1) = (-4, -1), then the slope-point form is
y + 1 = -2/7(x + 4)
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second picture (horizontal line)
from the graph, the slope is 0 because there is no rise for a horizontal line.
if (x1, y1) = (-2, 1), then the point slope form is
y - 1 = 0(x + 2)
_____________
third picture
from the graph, we have points (-2,2) and (2,-2) on the line. the slope is
slope = (-2 - 2)/(2 - (-2) ) = -1
if (x1, y1) = (-2,2), then point slope form is
y - 2 = -1(x + 2)
______________
fourth picture
if points (-2,-1) and (2,1) are on the graph, then slope is
slope = (1 - (-1) ) / (2 - (-2) ) = 1/2
with (x1, y1) = (-2,-1), the point slope form is
y + 1 = 1/2(x + 2)
_______________
fifth picture
we have points (-1,-2) and (1,2). the slope is
slope = (2 - (-2) ) / (1 - (-1) ) = 2
with (x1, y1) = (1,2), the point slope form is
y - 2 = 2(x - 1)
Step-by-step explanation:
Write what you know
mean is: Sum of all data points / Number of data points
any unknown number we'll call x
so youd write
(x + $3191) / 2 = $4444
Solve for x
let me know if you need further help
We want to solve this:
54x + 64 ≥ 49x + 59
First, subtract 49x from both sides and you would get:
5x + 64 ≥ 59
Then subtract 64 from both sides:
5x ≥ -5
Divide both sides by 5:
x ≥ -1
Brian was billed for 171 minutes.
Step-by-step explanation:
Given,
Monthly fee of phone = $8
Charges per minute = 6 cents = $0.06
Last month bill of phone = $18.26
Let,
x be the minutes billed.
Therefore,
Monthly fee + 0.06*minutes = Total bill
Dividing both sides by 0.06
Brian was billed for 171 minutes.
Keywords: linear equation, division
Learn more about division at:
#LearnwithBrainly
Answer: y = -2x +17
Step-by-step explanation:
y = mx + b
You are trying to make the equation look like that
So you subtract the 2x to the other side
Hope this helps! :)
