In Figure 9.1 assume an MPC of 0.8. Due to a $100 increase in investment, income increases by: Figure 9.1 Graph - Upward sloping line TE1=C+I1+G+(X-IM) intersected by the 45-degree line at Y1 marked along the horizontal axis; upward sloping line TE2=C+I2+G+(X-IM) intersected by the 45-degree line at Y2 marked along the horizontal axis; TE2 is above TE1; the distance between TE1 and TE2 is marked along the vertical axis as I=100 In Figure 9.1 assume an MPC of 0.8. Due to a $100 increase in investment, income increases by: $100 $800 $500 $1,000