Question

plot a line graph for the variable x and y where y=2x-1 , (i) find the value y when x=4 and (ii) x when y = 9​

Answer 1

Step-by-step explanation:

y = 2x-1

(i) x = 4

y = 2(4)-1

= 8-1

= 7

(ii) y = 9

9 = 2x-1

9+1 = 2x

10 = 2x

x= 5