Please help! Match the following equations with its y -intercept for its graph u
ID: 2874966 • Letter: P
Question
Please help!
Match the following equations with its y-intercept for its graph using the choices on the right.
y = 5 - 3x
y = 4.1x - 3
2x - 3y = 12
3.7x + 2.4y + 6 = 0
5
-3
-4
-2.5
4.1
Given the table below, find the y-intercept of the line containing the ordered pairs. Round your answer to two decimal places.
x
-1
2
3.5
5.6
7
8.3
y
0.85
5.35
7.6
10.75
12.85
14.8
Question options:
0.85
5.35
0
2.35
None of the others
The table below contains values of a linear function y.
Find a formula for the linear function expressing y as a function of x. Round the numbers to two decimal places.
x
1
3
4
7
9
y
10.05
7.55
6.30
2.55
0.05
Question options:
y = 1.25x + 11.30
y = -1.25x + 11.30
y = 11.30x - 1.25
y = 11.30x + 1.25
None of the others
Match each graph with its y-intercept. Be sure to note the window and scale given with each graph.
-7.5
5
-4
10
Given the table below, find the y-intercept of the line that contains the ordered pairs.
s
-2
0
3
5
8
F(s)
-5.2
1.2
10.8
17.2
26.8
Question options:
-5.2
1.2
10.8
17.2
26.8
Question 1 20 / 20 pointsExplanation / Answer
Question 1.
The equation of any straight line, called a linear equation, can be written as: y = mx + b, where m is the slope of the line and b is the y-intercept.
Hence to get y-intercept substitute x=0 in the equation and the value of y is the y-intercept
A.
y = 5 - 3x
y = 5 - 3*0 = 5-0 = 3
B.
y = 4.1x - 3
y = 4.1*0 - 3 = -3
C.
2x - 3y = 12
2*0 - 3y = 12
-3y = 12
y = -4
D.
3.7x + 2.4y + 6 = 0
3.7*0 + 2.4y + 6 = 0
2.4y + 6 = 0
2.4y = -6
y = -2.5
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