Grade 8 · Math
Evaluate a linear function practice
Find an output from a linear rule and a signed input.
Opening your practice adventure…
Try a sample
For y = 5x + (-6), what is y when x = -4?
- -27
- -26
- -24
- -22
See the answer & why
-26
Substitute x = -4: y = 5 × (-4) + (-6) = -26.
A little hint: Replace x, then apply the order of operations.
A teaching tip
Substitute with parentheses so a negative input keeps its sign.