Question

worksheet 4.1 (7.5)
hour 8
2.

$x$	$y=-2x+5$	$y$
$-1$	$y=-2\cdot-1+5$	$7$
2	$y=-2\cdot2+5$	$1$
0	$y=-2\cdot0+5$	$5$

Explanation:

Step1: Substitute x=5 into equation

$y=-2(5)+5 = -10+5$

Step2: Calculate y for x=5

$y=-5$

Step3: Substitute x=-1 into equation

$y=-2(-1)+5 = 2+5$

Step4: Calculate y for x=-1

$y=7$

Step5: Substitute x=2 into equation

$y=-2(2)+5 = -4+5$

Step6: Calculate y for x=2

$y=1$

Step7: Substitute x=0 into equation

$y=-2(0)+5 = 0+5$

Step8: Calculate y for x=0

$y=5$

Answer:

$x$	$y=-2x+5$	$y$
-1	$y=-2(-1)+5$	$7$
2	$y=-2(2)+5$	$1$
0	$y=-2(0)+5$	$5$

All the calculated values of $y$ match the filled-in values in the table, confirming they are correct.