Ginny Jones receives $624 gross salary biweekly. Her income tax rate is 14%. Her group health plan contribution is $4.25 per pay
period. She belongs to the company retirement plan, to which she contributes 6% of her earnings. She is also covered under Social Security benefits. Her current contribution is 6.05%. If these items are all her deductions, what is her take-home pay per period? Ginny gets a $35 raise per pay period. If her health plan is unchanged, how much of the raise will she have to take home?
Slope intercept form is . The -intercept is -1 so we have . To find , look at the points and . The line goes up 1 and over 4, so the slope, , equals . Thus the full equation is