Michael's total weekly pay includes a base salary plus certain percent of his sales. The table below show Michael's sales for 4 weeks and his total weekly pay. This data represents a linear function. What is Michael's weekly base salary?

Sales (x)week 1: $800 week 2: $460 week3: $540 week 4: $1000 Total Pay(y) week 1:$560 week 2: $460 week 3: $540 week 4: $600

3 answers

A linear equation is y=mx+b where x is the sales, b is the base pay, and m is the percentage used to find the commission. We have

560 = m*800 + b
460 = m*460 + b
540 = m*540 + b
600 = m*1000 + b

Those points do not fit any linear equation. Check for typos.
Sorry Steve, I miscopied the data, the x values for weeks 2 and 3 week 2 is actually 300 on sales and week 3 is 700 on sales, my bad
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