162k views
5 votes
HELP ME PLEASE!!!!!!!!!!!​

HELP ME PLEASE!!!!!!!!!!!​-example-1
User Markus
by
8.6k points

2 Answers

12 votes

Answer:

9.y=Mx+b

Y= 2/5x+4

10. y=Mx+b

Y=4x-5

Explanation:

User Jontsnz
by
8.3k points
9 votes

Answer:

9)
y=(2)/(5) x+4

10)
y=4x-5

Explanation:

Slope-intercept form is
y=mx+b where
m is the slope and
b is the y-intercept, or the value of y when the line crosses the y-axis.

Question 9


y=mx+b

The question tells us that the slope of the line is
(2)/(5). Because the slope is
m, plug
(2)/(5) into the equation as
m.


y=(2)/(5) x+b

Then, it tells us that the y-intercept is (0,4). Recall that the y-intercept is the value of y when the line crosses the y-axis. The value of y in the point (0,4) is 4. Because the y-intercept is
b, plug 4 into the equation as
b.


y=(2)/(5) x+4

Question 10


y=mx+b

First, we must calculate the slope using the slope equation:


(y_2-y_1)/(x_2-x_1) when the given points are
(x_1,y_1) and
(x_2,y_2)

The given points are (0,-5) and (2,3). Plug those into the equation.


(3-(-5))/(2-0)

Two negatives make a positive


= (3+5)/(2-0)\\= (8)/(2) \\= 4

Therefore, the slope of the line is 4. Plug 4 into the original equation as
m.


y=4x+b

Now, we can find the y-intercept by simply looking at the graph. The line crosses the y-axis at the point (0,-5). Therefore, the y-intercept is -5. Plug -5 into the equation as
b.


y=4x+(-5)\\y=4x-5

I hope this helps!

User Bianca
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories