Observe Changes: Step 1: Observe the changes in x and y values.x increases by 4 each time (45 to 49, 49 to 53, 53 to 57).y decreases by y1 each time (y2 to y1, y1 to y5, y5 to y7).
Calculate Rate of Change: Step 2: Calculate the rate of change for y with respect to x.Change in y=−5 (from 10 to 5)Change in x=4 (from 45 to 49)Rate of change=Change in xChange in y=4−5=−1.25
Formulate Relationship: Step 3: Formulate the relationship using the slope-intercept form y=mx+b.Slope m = −1.25 from Step 2.Use one point to solve for b, using point (45,10).10=−1.25(45)+b10=−56.25+bb=10+56.25=66.25
Write Final Equation: Step 4: Write the final equation.y=−1.25x+66.25