Maths Homework - 10A1 - Due 02/12 Return to Assigned Work
Overview
2
8
10
11 12
Question Progress
314 Marks
Homework Progress
31142 Marks
وأسأل
a) Complete the table of values for y = 3x - 1
c)
Х
-2
0
1
1
2
3
6
4
Submit Answer
y
-7
-4
-1
2
5
8
b) Draw the graph of y = 3x - 1
on the grid.
NP
NO
c) Use the graph to estimate the
value of y when x = 2.5
+

The answer is below

Step-by-step explanation:

a) To complete the table of values for y = 3x - 1, we substitute the value of x into the equation and find y.

For x = -2, y = 3(-2) - 1 = -7; For x = -1, y = 3(-1) - 1 = -4

For x = 0, y = 3(0) - 1 = -1;    For x = 1, y = 3(1) - 1 = 2

For x = 2, y = 3(2) - 1 = 5;    For x = 3, y = 3(3) - 1 = 8

x:    -2      -1        0        1         2       3

y:    -7      -4       -1        2         5      8

b) The graph is drawn using geogebra online graphing calculator.

c) From the graph, When x = 2.5, y = 6.5

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

actually what is a question i don't understand