BECE Mathematics 2019 Paper

Test all the available rules with the values of x to see if you get the corresponding y values of the x
Option A
y=2x+2
When x=1
y=2(1)+2=2×1+2=4
Since y≠3, option A is not the answer
Option B
y=−2x+2
When x=1
y=−2(1)+2=−2×1+2=−2+2=0
Option C
y=4x
When x=1
y=4(1)=4×1=4
Since y≠3, option C is not the answer
So automatically the answer will be option D but you can still verify
y=−2x+5
When x=1
y=−2(1)+5=−2×1+5=−2+5=3
When x=2
y=−2(2)+5=−2×2+5=−4+5=1
When x=3
y=−2(3)+5=−2×3+5=−6+5=−1
When x=4
y=−2(4)+5=−2×4+5=−8+5=−3
When x=5
y=−2(5)+5=−2×5+5=−10+5=−5