Page 199 - Mathematics_F1

7. (a) y

12
(6, 12)
FOR ONLINE READING ONLY
10
8
y = 2x
6

4 (2, 4)
Tanzania Institute of Education
2

-4 -2 0 2 4 6 8 x

-2

-4

(b) (i) Gradient is 2 which signifies that 2 acres farm uses 1 bag of fertilizer
(ii) y = 2x and x and y-intercepts are (0, 0)

(c) (i) Nyanda will need 12 bags of fertilizer
(ii) The size of Myoma farm is 150 acres

Exercise 6.4

1. (a) 3x y+− 10 0= (c) y − 40= (e) 3x − 5y + 14 0=
50
(b) x y+ −= (d) x − 5y − 19 0=
3. (a) 5x y−− 14 0= (c) 11x − 3y − 39 0=

(b) 3x + 5y − 7 14 0= 11 (d) x + 5y − 20=
Mathematics Form One 5. (a) y = − − 2x − 5, m = and (0, − 5) 
7
11

, m = − and 0,
x +

4
4
4

4 

14
14
(b) y =
x +
4, m = −
and (0, 4)
3
3
2
(c) y =
192
25/09/2025 15:02:22
Mathematics form 1.indd 192
Mathematics form 1.indd 192 25/09/2025 15:02:22