Answer:
B)-4
Step-by-step explanation:
y=mx+c
sub in a point and gradient/slope to get c
-7=3(-1)+c
-7=-3+c
-7+3=c
c=-4
y=3x-4
if u looking for the y intercept make x=0
y=3(0)-4
y=-4
The slope of the line between the points On the line would be -1. And the y intercept would be 1.
Y = -x + 1.
so if 5.5 is in meter let change it to cm because the question want us to give the answer in cm.
![1cm = 0.01meter](https://tex.z-dn.net/?f=1cm%20%3D%200.01meter)
![to \: turn \: meters \: into \: \\ cm \: we \: have \: to \: multiply \: by \: 100](https://tex.z-dn.net/?f=to%20%5C%3A%20turn%20%5C%3A%20meters%20%5C%3A%20into%20%5C%3A%20%5C%5C%20%20cm%20%5C%3A%20we%20%5C%3A%20have%20%5C%3A%20to%20%5C%3A%20multiply%20%5C%3A%20%20by%20%5C%3A%20100)
now we multiply 5.5 times 100 which is equal to 550.
next we subtract 550 - 220= 330.
finally, the difference between a teacher and student is 330cm .meaning the teacher's desk is 330 cm longer or taller than the student.
Make denominator same first.
1/2 - 1/6
3/6 - 1/6
Now subtract numerators
(3-1) / 6
2/6
Now simplify
1/3
Final answer: 1/3