Question

1. table d

monthly salary in $, x	amount deposited in $, y
998	598
1,015	615
2,110	1,710

electricity bill in $, x	total expenses in $, y
124	524
309	709
816	1,216
1,024	1,412

1. based on your observations and descriptions from above, match each table to the equation that describes the relationship between x and y.

$400 + x = y$ ______
$x - 400 = y$ ______
$x + y = 400$ ______
$400 \cdot x = y$ ______

integrated math 1a- hs2081 - unit 3
© skyrocket, inc.
11
student activity workbook- spring 2023

Explanation:

Step1: Analyze first table (electricity/total expenses)

Test pairs: $85 + 400 = 485$, $124 + 400 = 524$, $309 + 400 = 709$, $816 + 400 = 1216$, $1024 + 400 = 1412$. All match $400 + x = y$.

Step2: Analyze second table (salary/deposit)

Test pairs: $872 - 400 = 472$, $998 - 400 = 598$, $1015 - 400 = 615$, $2110 - 400 = 1710$. All match $x - 400 = y$.

Step3: Match remaining equations

No tables fit $x+y=400$ or $400 \cdot x = y$, so they remain unmatched.

Answer:

$400 + x = y$ → Electricity bill/total expenses table
$x - 400 = y$ → Monthly salary/deposit table
$x + y = 400$ → No matching table
$400 \cdot x = y$ → No matching table