Answer - D.
you basically find the equation of the line first and eliminate the wrong answers...
Strategy: before u do any of this, label your coordinates as (X1,Y1) and (X2,Y2) and u can choose any of ur points to be as x1 or x2 or y1 or y1...
basically, I'll choose (6,7) as (x1,y1) and (2,-1) as (x2,y2). SO,
First you have to find the gradient (m) of the line.
you do this by using the formula m = Y2-Y1 / X2-X1 (where '/' is division sign) ....
Put the numbers in their respective places and your gradient will be 2x. we put the x after our number to represent it as a gradient as the straight line formula is y = mx+c and you've found the m.
NOW.
use the formula Y-Y1=m(x-x1) to find the equation of the line.Again u can use any Y1 and X1 here but remember your m is 2
replace the digits and solve...Hopefully you'll get sth like this if you use the points (6,7):
Y-7 = 2(x-6) ....
y=2x-12+7...
Y=2x-5! <<<< this is your straight line equation!
Now all u gotta do is rearrange all your options into y = mx+c.
D. is incorrect as it gives us y=2x+5 and not y = 2x-5 unlike the others
Hope you get it!
Hello there.
<span>Ariel travels 400 miles in 8 hours. What is her rate of change or rate?
</span>Rate of change is defined as
change in distance
<span>change in time
400 </span>÷ 8 = 50
Answer: <span>B) 50 miles per hour
</span>
32. 5^-2=1/25
5^-1=1/5
5^0=1
5^1=5
5^2=25
5^3=125
The domain are -2,-1,0,1,2,3,
The range are 1/25,1/5,1,5,25,125
So as the domain increases so does the range
Answer:
A
Step-by-step explanation:
10 divided by 1.25=8
Answer:
The Answer is: 5.
Step-by-step explanation:
Let n = number.
The number times 31 plus 40 is equal to 200 minus the number:
31n + 40 = 200 - n
32n = 200 - 40
32n = 160
n = 5
Proof:
31(5) + 40 = 200 - 5
155 + 40 = 195
195 = 195
Hope this helps! Have an Awesome Day!! :-)
